fix: bugs using real hardware

README.md

@@ -7,5 +7,25 @@ This template should help get you started developing with Tauri, React and Types
 - [VS Code](https://code.visualstudio.com/) + [Tauri](https://marketplace.visualstudio.com/items?itemName=tauri-apps.tauri-vscode) + [rust-analyzer](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer)
 
 # TODO
+
 - Move meters polling logic outside dsp state because it causes re-render of everything tied to dsp constantly
+
 - Check render to improve perfoormances
+
+- Check in meter if clip bool is limit instead
+
+- On close disconenct all ds^p
+
+- Check end to end behavioour
+
+- Roll back on scroll when 2 scroll
+
+- test en dto end connection
+ 
+Data: 10020001052f 31313131 10032a // lock
+
+Data: 10020001052d 31313131 100328 // unlock fail
+Data: 10020100032d 3100 10031f
+
+Data: 10020001062d 0031313131 10032b // unlock success
+Data: 10020100032d 0001 10032f

package-lock.json

@@ -1097,9 +1097,6 @@
         "arm"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1114,9 +1111,6 @@
         "arm"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1131,9 +1125,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1148,9 +1139,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1165,9 +1153,6 @@
         "loong64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1182,9 +1167,6 @@
         "loong64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1199,9 +1181,6 @@
         "ppc64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1216,9 +1195,6 @@
         "ppc64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1233,9 +1209,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1250,9 +1223,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1267,9 +1237,6 @@
         "s390x"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1284,9 +1251,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1301,9 +1265,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1493,9 +1454,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "Apache-2.0 OR MIT",
       "optional": true,
       "os": [
@@ -1513,9 +1471,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "Apache-2.0 OR MIT",
       "optional": true,
       "os": [
@@ -1533,9 +1488,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "Apache-2.0 OR MIT",
       "optional": true,
       "os": [
@@ -1553,9 +1505,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "Apache-2.0 OR MIT",
       "optional": true,
       "os": [
@@ -1573,9 +1522,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "Apache-2.0 OR MIT",
       "optional": true,
       "os": [
@@ -1809,9 +1755,9 @@
       }
     },
     "node_modules/baseline-browser-mapping": {
-      "version": "2.10.44",
+      "version": "2.11.21",
-      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.10.44.tgz",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.11.21.tgz",
-      "integrity": "sha512-T3ghW+sl/ZJ8w1v/yQx3qvJ9040DWoLBz8JT/CILbAKcFyG9b2MRe75v6W5uXjv6uH1lumK2Kv46y2zSkcej0Q==",
+      "integrity": "sha512-uh8vpY/1/YyFkunIDFH/12p7/7VdPKA1hejMVEbdkEaWnUz0Hesvx5EbiU6XxjyHZIOju+ZMbQJkRh+es3/spQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -1822,9 +1768,9 @@
       }
     },
     "node_modules/brace-expansion": {
-      "version": "5.0.7",
+      "version": "5.0.9",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.7.tgz",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.9.tgz",
-      "integrity": "sha512-7oFy703dxfY3/NLxC1fh2SUCQ0H9rmAY+5EpDVfXjUTTs+HEwR2nYaqLv+GWcTsumwxPfiz6CzCNkwXwBUwqCA==",
+      "integrity": "sha512-ScQ4IuvIEF1TMlP7Zt+vjJ//9zlPb2SDcxWxM3bk8s6t6GGdJ7KO1dCcTidOPJKePW30LE/2cT7wCyPho9/Wxg==",
       "dev": true,
       "license": "MIT",
       "peer": true,
@@ -1832,13 +1778,13 @@
         "balanced-match": "^4.0.2"
       },
       "engines": {
-        "node": "18 || 20 || >=22"
+        "node": "20 || >=22"
       }
     },
     "node_modules/browserslist": {
-      "version": "4.28.6",
+      "version": "4.28.9",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.6.tgz",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.9.tgz",
-      "integrity": "sha512-FQBYNK15VMslhLHpA7+n+n1GOlF1kId2xcCg7/j95f24AOF6VDYMNH4mFxF7KuaTdv627faazpOAjFzMrfJOUw==",
+      "integrity": "sha512-EWazOblFYUvlGZcfGhPUPmYh3nikUxBVb+y9MJun5f3hBi812X+8MSQTujLBtgK3cf51fJWbWfOjyeO954d+Eg==",
       "dev": true,
       "funding": [
         {
@@ -1856,11 +1802,11 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "baseline-browser-mapping": "^2.10.42",
+        "baseline-browser-mapping": "^2.11.20",
-        "caniuse-lite": "^1.0.30001803",
+        "caniuse-lite": "^1.0.30001810",
-        "electron-to-chromium": "^1.5.389",
+        "electron-to-chromium": "^1.5.420",
-        "node-releases": "^2.0.51",
+        "node-releases": "^2.0.54",
-        "update-browserslist-db": "^1.2.3"
+        "update-browserslist-db": "^1.3.2"
       },
       "bin": {
         "browserslist": "cli.js"
@@ -1870,9 +1816,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001806",
+      "version": "1.0.30001810",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001806.tgz",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001810.tgz",
-      "integrity": "sha512-72Cuvd95zbSYPKq6Fhg8eDJRlzgWDf7/mtoZv6Qe/DYNCEBdNxoA3+rZAU2ZhGCpZlns3EssFavaZomckT5Uuw==",
+      "integrity": "sha512-TITQPUkaz+aVk5GL6NhOdwk1aEaNTSDPsGFWrTuhKGtjTF70jL/Oht2W4c6rXUe5fu7Ie19VIahAXHIIiWWNeg==",
       "dev": true,
       "funding": [
         {
@@ -1947,9 +1893,9 @@
       "peer": true
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.5.394",
+      "version": "1.5.422",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.394.tgz",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.422.tgz",
-      "integrity": "sha512-Wmt2Gm0o8JWBuGgmc4XZ0u9s1RaCRqhxP47phplmfg04+qypTUurpeJGP45A7Fhv7jdrrVH44PLlR9qXo37cVQ==",
+      "integrity": "sha512-UvA/32XqrLDdZSn7Jllo1AYNcWji/G0d5M0GTViE7KoGBiMunw3a34Sb2KO4ZZyrSEhqsxFoVhWWJshdyfKqJA==",
       "dev": true,
       "license": "ISC"
     },
@@ -2562,9 +2508,9 @@
       "license": "MIT"
     },
     "node_modules/nanoid": {
-      "version": "3.3.16",
+      "version": "3.3.18",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.16.tgz",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.18.tgz",
-      "integrity": "sha512-bzlKTyNJ7+LdGIIwy8ijFpIqEQIvafahV7eYykJ8Cvh42EdJeODoJ6gUJXpQJvej1BddH8OqTXZNE/KfbWAu8Q==",
+      "integrity": "sha512-DTg4MJbGMWkfi6VZFdNt2/caMbQy4Ou+Op/hJQvGEWcnVfoA1QA+xzRKAzw9jD6+GVOOeYr/mIcuDSdug6F6+w==",
       "dev": true,
       "funding": [
         {
@@ -2589,9 +2535,9 @@
       "peer": true
     },
     "node_modules/node-releases": {
-      "version": "2.0.51",
+      "version": "2.0.54",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.51.tgz",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.54.tgz",
-      "integrity": "sha512-wRNIrw4DmVLKQlbgOMdkMx27Wrpzes2hh5Jtbi2bjPd+4wJstWIqP5A+lscnqbm0xxmT5Bpg8Lec5ItEBwx6BQ==",
+      "integrity": "sha512-YHs7BmmcsdAI5Ozuf8JZo6PT0mv2GIWC9vMfvUC3dp65M8hn7Ux8CPL+2oBI7juNuj9d0ndhTcznq2ODBps9cQ==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -2694,9 +2640,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.21",
+      "version": "8.5.28",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.21.tgz",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.28.tgz",
-      "integrity": "sha512-v4sDNP3fdNiWMfabO7OwOQdOX8TiQSztKyT1Wj0w+j7LDallJThJRBBBmzVGyYj0crMh7jlV4zepPkiNu9UwDQ==",
+      "integrity": "sha512-RRuzqDtt5Y9h3quz5hWhK+TPnsmVs6WwSU6LkJMeY4HstUEDuYTG8UJSdawMRzmzAtV+KEoG8N3Qg2qLy5vM/A==",
       "dev": true,
       "funding": [
         {
@@ -2714,7 +2660,7 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "nanoid": "^3.3.16",
+        "nanoid": "^3.3.18",
         "picocolors": "^1.1.1",
         "source-map-js": "^1.2.1"
       },
@@ -2962,9 +2908,9 @@
       }
     },
     "node_modules/update-browserslist-db": {
-      "version": "1.2.3",
+      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.3.2.tgz",
-      "integrity": "sha512-Js0m9cx+qOgDxo0eMiFGEueWztz+d4+M3rGlmKPT+T4IS/jP4ylw3Nwpu6cpTTP8R1MAC1kF4VbdLt3ARf209w==",
+      "integrity": "sha512-UQ+MSxlhRm1bzjhU+DcuXfjFO1FzNtqhK5+9Yvlp90ItDLk5vT932A0rFu619nf7RVS+Y/VeaUW1jaRDqZ8VJw==",
       "dev": true,
       "funding": [
         {

src-tauri/Cargo.lock

@@ -175,7 +175,7 @@ checksum = "ae36dc4177970ef04fde5178d3e2429882def40e57a451f919c098f72baa6cec"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -225,6 +225,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "base64"
+version = "0.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac07cdecf99051d9a5238b80f35af32cdeba5b336e55d957b318b50137e18da5"
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -397,7 +403,7 @@ dependencies = [
  "semver",
  "serde",
  "serde_json",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
 ]
 
 [[package]]
@@ -453,6 +459,17 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "chacha20"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65c35e4b699c7e15ccbe7ee35c005e4fc0a278d22238a2857e6ce2dadeda1b06"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.1",
+ "rand_core",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.45"
@@ -543,6 +560,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cpufeatures"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ca28b0ae3115b884660db4118d803791fd6756b6e88f39c0f3f7859060d7566"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "crc32fast"
 version = "1.5.0"
@@ -618,9 +644,9 @@ checksum = "52560adf09603e58c9a7ee1fe1dcb95a16927b17c127f0ac02d6e768a0e25bc1"
 
 [[package]]
 name = "darling"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25ae13da2f202d56bd7f91c25fba009e7717a1e4a1cc98a76d844b65ae912e9d"
+checksum = "ed17f5901b6630b993ca003def43f2f8ef4014fc13b047b57aad617ff32bc2ec"
 dependencies = [
  "darling_core",
  "darling_macro",
@@ -628,26 +654,26 @@ dependencies = [
 
 [[package]]
 name = "darling_core"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9865a50f7c335f53564bb694ef660825eb8610e0a53d3e11bf1b0d3df31e03b0"
+checksum = "6837e2cf7485aaae18f86181d2f0e9a7ed297a025e220aeabf63fdebd3a2ddff"
 dependencies = [
  "ident_case",
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.119",
+ "syn 3.0.6",
 ]
 
 [[package]]
 name = "darling_macro"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
+checksum = "2ac7135c3ef02b2f7833bbeb1be5ba7f966dcde8a87c6b87f65a778d71a02785"
 dependencies = [
  "darling_core",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -661,6 +687,37 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "defmt"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2953bfe4f93bbd20cc71198842756f77d161884c99ebbabc41d80231ded88d1"
+dependencies = [
+ "bitflags 1.3.2",
+ "defmt-macros",
+]
+
+[[package]]
+name = "defmt-macros"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bad9c72e7ca2137e0dc3813245a0d282fd6daad32fd800af018306a9169b5fe8"
+dependencies = [
+ "defmt-parser",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "defmt-parser"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
+dependencies = [
+ "thiserror 2.0.21",
+]
+
 [[package]]
 name = "deranged"
 version = "0.5.8"
@@ -796,11 +853,13 @@ dependencies = [
 name = "dsp_thomann"
 version = "0.1.0"
 dependencies = [
+ "rand",
  "serde",
  "serde_json",
+ "serde_with",
  "strum",
  "strum_macros",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
 ]
 
 [[package]]
@@ -1254,6 +1313,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "r-efi 6.0.0",
+ "rand_core",
 ]
 
 [[package]]
@@ -1761,6 +1821,60 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "jiff"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1baf72f08796de0260609515130699b890ac25f30e610ad894bc5856cafdb"
+dependencies = [
+ "defmt",
+ "jiff-core",
+ "jiff-static",
+ "jiff-tzdb-platform",
+ "log",
+ "portable-atomic",
+ "portable-atomic-util",
+ "serde_core",
+ "windows-link 0.2.1",
+]
+
+[[package]]
+name = "jiff-core"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e52fe76043ccecc9005d2305ebaadf7d7fc0cc89ca6baa10a94d6bc68c7128c"
+dependencies = [
+ "defmt",
+ "log",
+]
+
+[[package]]
+name = "jiff-static"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "378268a1116ad67ae6228701118ac9f491d78fda38a40a1f1a9e1348de6f7212"
+dependencies = [
+ "jiff-core",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "jiff-tzdb"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "142bd39932ad231f10513df9ab62661fead8719872150b7ad02a2df79f4e141e"
+
+[[package]]
+name = "jiff-tzdb-platform"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "875a5a69ac2bab1a891711cf5eccbec1ce0341ea805560dcd90b7a2e925132e8"
+dependencies = [
+ "jiff-tzdb",
+]
+
 [[package]]
 name = "jni"
 version = "0.21.1"
@@ -2004,7 +2118,7 @@ dependencies = [
  "once_cell",
  "png 0.18.1",
  "serde",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "windows-sys 0.61.2",
 ]
 
@@ -2492,6 +2606,21 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05c8b63e8d9609db387f0324918f81d68fe27748f084ef092fb35954d0539a85"
+
+[[package]]
+name = "portable-atomic-util"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10ab3eb7f3becc3a1cbc4f2c6f20267996cfc1a6467a873763411b136a122715"
+dependencies = [
+ "portable-atomic",
+]
+
 [[package]]
 name = "potential_utf"
 version = "0.1.5"
@@ -2605,6 +2734,23 @@ version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
+[[package]]
+name = "rand"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65c9fb96cbc91e3478eaae79a69fcd3f1ae4ad052e471fe6732fff548984b4af"
+dependencies = [
+ "chacha20",
+ "getrandom 0.4.3",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
 [[package]]
 name = "raw-window-handle"
 version = "0.6.2"
@@ -2628,7 +2774,7 @@ checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
 dependencies = [
  "getrandom 0.2.17",
  "libredox",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
 ]
 
 [[package]]
@@ -2648,7 +2794,7 @@ checksum = "2c9283685feec7d69af75fb0e858d5e7378f33fe4fc699383b2916ab9273e03c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2882,7 +3028,7 @@ checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2917,7 +3063,7 @@ checksum = "8d3b1629de253c70a0508c3899572da79ca359fdab27c7920ff00406df418906"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2940,16 +3086,17 @@ dependencies = [
 
 [[package]]
 name = "serde_with"
-version = "3.21.0"
+version = "3.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76a5c54c7310e7b8b9577c286d7e399ddd876c3e12b3ed917a8aabc4b96e9e8c"
+checksum = "df9adc193c780ef8f159aee8b61e2d5801aaa555e6eb0947fe45530ec506296f"
 dependencies = [
- "base64 0.22.1",
+ "base64 0.23.1",
  "bs58",
  "chrono",
  "hex",
  "indexmap 1.9.3",
  "indexmap 2.14.0",
+ "jiff",
  "schemars 0.9.0",
  "schemars 1.2.1",
  "serde_core",
@@ -2960,14 +3107,14 @@ dependencies = [
 
 [[package]]
 name = "serde_with_macros"
-version = "3.21.0"
+version = "3.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84d57bc0c8b9a17920c178daa6bb924850d54a9c97ab45194bb8c17ad66bb660"
+checksum = "3e17bbc68e28663bbbb90df47e058aa7eda4fb445b89fe70457bb94fbccf6e49"
 dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3008,7 +3155,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
  "digest",
 ]
 
@@ -3198,9 +3345,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "3.0.2"
+version = "3.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a207d6d6a2b7fc470b80443726053f18a2481b7e1eee970597051596567987a3"
+checksum = "8593e8e72159ed2257d083c7a454a85cbf854f37a0966d8d483aff8c8a3ebcee"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3299,9 +3446,9 @@ checksum = "61c41af27dd6d1e27b1b16b489db798443478cef1f06a660c96db617ba5de3b1"
 
 [[package]]
 name = "tauri"
-version = "2.11.5"
+version = "2.11.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "667b20e2726d572dea2de7370da16e188eb06008faf9a92fab7cdc46791190b5"
+checksum = "6fa5bacdb9bbad5954af3d1bd6cf6ae9192cab1b2e270f4a07f904610b9e85f4"
 dependencies = [
  "anyhow",
  "bytes",
@@ -3338,7 +3485,7 @@ dependencies = [
  "tauri-runtime",
  "tauri-runtime-wry",
  "tauri-utils",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "tokio",
  "tray-icon",
  "url",
@@ -3389,7 +3536,7 @@ dependencies = [
  "sha2",
  "syn 2.0.119",
  "tauri-utils",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "time",
  "url",
  "uuid",
@@ -3428,9 +3575,9 @@ dependencies = [
 
 [[package]]
 name = "tauri-plugin-opener"
-version = "2.5.4"
+version = "2.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17e1bea14edce6b793a04e2417e3fd924b9bc4faae83cdee7d714156cceeed29"
+checksum = "60d60366174b745b4ef5824b8bbc1c457fd08f0ce101ff643c0a49181a9f4e91"
 dependencies = [
  "dunce",
  "glob",
@@ -3442,7 +3589,7 @@ dependencies = [
  "serde_json",
  "tauri",
  "tauri-plugin",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "url",
  "windows",
  "zbus",
@@ -3466,7 +3613,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tauri-utils",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "url",
  "webkit2gtk",
  "webview2-com",
@@ -3529,7 +3676,7 @@ dependencies = [
  "serde_json",
  "serde_with",
  "swift-rs",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "toml 1.1.3+spec-1.1.0",
  "url",
  "urlpattern",
@@ -3581,11 +3728,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.19"
+version = "2.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09a43598840e33d5b0331f38c5e30d13bb11c11210a4b58f0d9b18a5a5eefcd9"
+checksum = "09e52cb86a36cede5cb101bf8908837b3e4c6e5e59fe7fd85c23fb56200d189e"
 dependencies = [
- "thiserror-impl 2.0.19",
+ "thiserror-impl 2.0.21",
 ]
 
 [[package]]
@@ -3601,13 +3748,13 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.19"
+version = "2.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43cbfe0cf76104d42a574802844187e84a305e531ed54455f11fbde0f10541cd"
+checksum = "fe5197923287db20a58125f0bc85c062f7f2c892de97b18c356f9efb14b28524"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3918,7 +4065,7 @@ dependencies = [
  "once_cell",
  "png 0.18.1",
  "serde",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "windows-sys 0.61.2",
 ]
 
@@ -4278,7 +4425,7 @@ version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "381336cfffd772377d291702245447a5251a2ffa5bad679c99e61bc48bacbf9c"
 dependencies = [
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "windows",
  "windows-core 0.61.2",
 ]
@@ -4713,7 +4860,7 @@ dependencies = [
  "sha2",
  "soup3",
  "tao-macros",
- "thiserror 2.0.19",
+ "thiserror 2.0.21",
  "url",
  "webkit2gtk",
  "webkit2gtk-sys",

src-tauri/Cargo.toml

@@ -18,8 +18,8 @@ crate-type = ["staticlib", "cdylib", "rlib"]
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = [] }
+tauri = { version = "2.11.6", features = [] }
-tauri-plugin-opener = "2"
+tauri-plugin-opener = "2.5.5"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-dsp_thomann = { path = "../../dsp_thomann", features = ["serialization"] }
+dsp_thomann = { path = "../../dsp-thomann", features = ["serialization"] }

src-tauri/icons/android/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+  <background android:drawable="@color/ic_launcher_background"/>
+</adaptive-icon>

src-tauri/icons/android/values/ic_launcher_background.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="ic_launcher_background">#fff</color>
+</resources>

src-tauri/icons/icon.svg

@@ -0,0 +1,87 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="200"
+  height="200"
+  viewBox="0 0 200 200"
+>
+  <defs>
+    <linearGradient
+      id="richGradient"
+      x1="0%"
+      y1="0%"
+      x2="100%"
+      y2="100%"
+    >
+      <stop offset="0%" stop-color="#1e3a8a" stop-opacity="1"/>
+      <stop offset="25%" stop-color="#2d3485"/>
+      <stop offset="45%" stop-color="#4c2e7f"/>
+      <stop offset="60%" stop-color="#6b2878"/>
+      <stop offset="80%" stop-color="#b9326e"/>
+      <stop offset="100%" stop-color="#ea437a" stop-opacity="1"/>
+    </linearGradient>
+
+    <radialGradient
+      id="darkenGradient"
+      cx="50%"
+      cy="50%"
+      r="50%"
+    >
+      <stop offset="0%" stop-color="#ffffff" stop-opacity="0.3"/>
+      <stop offset="30%" stop-color="#ffffff" stop-opacity="0.1"/>
+      <stop offset="60%" stop-color="#000000" stop-opacity="0"/>
+      <stop offset="80%" stop-color="#000000" stop-opacity="0.2"/>
+      <stop offset="100%" stop-color="#000000" stop-opacity="0.5"/>
+    </radialGradient>
+
+    <linearGradient
+      id="shadowGradient"
+      x1="20%"
+      y1="20%"
+      x2="80%"
+      y2="80%"
+    >
+      <stop offset="0%" stop-color="#0f1d42"/>
+      <stop offset="25%" stop-color="#1f2a5d"/>
+      <stop offset="45%" stop-color="#332f78"/>
+      <stop offset="60%" stop-color="#5f3458"/>
+      <stop offset="80%" stop-color="#7a2250"/>
+      <stop offset="100%" stop-color="#a50d57"/>
+    </linearGradient>
+  </defs>
+
+  <!-- Main donut -->
+  <path
+    d="
+      M100,20
+      A80,80 0 1,1 99.9,20
+      M100,60
+      A40,40 0 1,0 100.1,60
+    "
+    fill="url(#richGradient)"
+    fill-rule="evenodd"
+  />
+
+  <!-- Darkening / depth overlay -->
+  <path
+    d="
+      M100,20
+      A80,80 0 1,1 99.9,20
+      M100,60
+      A40,40 0 1,0 100.1,60
+    "
+    fill="url(#darkenGradient)"
+    fill-rule="evenodd"
+  />
+
+  <!-- Inner shadow -->
+  <path
+    d="
+      M100,60
+      A40,40 0 1,0 100.1,60
+      M100,75
+      A25,25 0 1,1 99.9,75
+    "
+    fill="url(#shadowGradient)"
+    fill-rule="evenodd"
+  />
+</svg>

src-tauri/src/commands.rs

@@ -41,16 +41,28 @@ impl AppState {
     }
 }
 
+#[derive(serde::Serialize)]
+pub struct DSP408Snapshot {
+    pub state: types::DSPState,
+    pub input_meters: types::InputMeters,
+    pub output_meters: types::OutputMeters,
+}
+
 #[tauri::command]
 pub fn create_dsp408(
     state: State<AppState>,
     ip: String,
     port: u16,
     device_id: u8,
+    demo: bool,
 ) -> Result<u64, String> {
     let ip = IpAddr::from_str(&ip).map_err(|e| e.to_string())?;
 
-    let dsp = DSP408::new(ip, port, device_id).map_err(|e| e.to_string())?;
+    let dsp = if demo {
+        DSP408::new_demo()
+    } else {
+        DSP408::new(ip, port, device_id).map_err(|e| e.to_string())?
+    };
 
     let mut next_id = state.next_id.lock().map_err(|e| e.to_string())?;
 
@@ -82,14 +94,16 @@ pub async fn remove_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), St
 }
 
 #[tauri::command]
-pub async fn connect_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), String> {
+pub async fn get_dsp_snapshot(
-    state.with_device_mut(id, |device| device.dsp.connect().map_err(|e| e.to_string()))
+    state: State<'_, AppState>,
-}
+    id: u64,
-
+) -> Result<DSP408Snapshot, String> {
-#[tauri::command]
-pub async fn disconnect_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), String> {
     state.with_device_mut(id, |device| {
-        device.dsp.disconnect().map_err(|e| e.to_string())
+        Ok(DSP408Snapshot {
+            state: device.dsp.state().clone(),
+            input_meters: device.dsp.input_meters().clone(),
+            output_meters: device.dsp.output_meters().clone(),
+        })
     })
 }
 
@@ -99,63 +113,39 @@ pub async fn get_dsp_state(
     id: u64,
 ) -> Result<dsp_thomann::dsp408::types::DSPState, String> {
     state.with_device_mut(id, |device| {
-        let dsp_state = device.dsp.state().map_err(|e| e.to_string())?;
+        let dsp_state = device.dsp.state();
 
         Ok(dsp_state.clone())
     })
 }
 
+// Commands
 #[tauri::command]
-pub async fn set_channel_gain(
+pub async fn connect_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), String> {
-    state: State<'_, AppState>,
+    state.with_device_mut(id, |device| device.dsp.connect().map_err(|e| e.to_string()))
-    id: u64,
+}
-    channel: dsp_thomann::dsp408::types::Channel,
-    db: f32,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        let r = device
-            .dsp
-            .set_channel_gain(channel, db)
-            .map_err(|e| e.to_string())?;
 
-        Ok(r)
+// Command `0x11`
+#[tauri::command]
+pub async fn disconnect_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), String> {
+    state.with_device_mut(id, |device| {
+        device.dsp.disconnect().map_err(|e| e.to_string())
     })
 }
 
+// Command `0x15`
 #[tauri::command]
-pub async fn set_mute(
+pub async fn set_delay_unit(
     state: State<'_, AppState>,
     id: u64,
-    channel: dsp_thomann::dsp408::types::Channel,
+    unit: types::DelayUnit,
-    muted: bool,
 ) -> Result<bool, String> {
     state.with_device_mut(id, |device| {
-        let r = device
+        device.dsp.set_delay_unit(unit).map_err(|e| e.to_string())
-            .dsp
-            .set_mute(channel, muted)
-            .map_err(|e| e.to_string())?;
-
-        Ok(r)
-    })
-}
-
-#[tauri::command]
-pub async fn set_channel_inverse_gain(
-    state: State<'_, AppState>,
-    id: u64,
-    channel: dsp_thomann::dsp408::types::Channel,
-    inverted: bool,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        let r = device
-            .dsp
-            .set_channel_inverse_gain(channel, inverted)
-            .map_err(|e| e.to_string())?;
-
-        Ok(r)
     })
 }
 
+// Command `0x20`
 #[tauri::command]
 pub async fn recall_preset(
     state: State<'_, AppState>,
@@ -172,16 +162,35 @@ pub async fn recall_preset(
     })
 }
 
+// Command `0x21` -- TODO
 #[tauri::command]
-pub async fn get_meter_levels(
+pub async fn store_current_configuration(
     state: State<'_, AppState>,
     id: u64,
-) -> Result<dsp_thomann::dsp408::types::Meters, String> {
+    preset_index: usize,
+    force: bool,
+) -> Result<bool, String> {
     state.with_device_mut(id, |device| {
-        device.dsp.get_meter_levels().map_err(|e| e.to_string())
+        device
+            .dsp
+            .store_current_configuration(preset_index, force)
+            .map_err(|e| e.to_string())
     })
 }
 
+// Command `0x23`
+#[tauri::command]
+pub async fn factory_reset(
+    state: State<'_, AppState>,
+    id: u64,
+    force: bool,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device.dsp.factory_reset(force).map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x26`
 #[tauri::command]
 pub async fn set_current_preset_name(
     state: State<'_, AppState>,
@@ -196,24 +205,53 @@ pub async fn set_current_preset_name(
     })
 }
 
+// Command `0x2A`
 #[tauri::command]
-pub async fn set_gate(
+pub async fn copy_channel(
     state: State<'_, AppState>,
     id: u64,
-    channel: types::InputChannel,
+    channel_1: types::Channel,
-    threshold: f32,
+    channel_2: types::Channel,
-    attack: u16,
-    hold: u16,
-    release: u16,
 ) -> Result<bool, String> {
     state.with_device_mut(id, |device| {
         device
             .dsp
-            .set_gate(channel, threshold, attack, hold, release)
+            .copy_channel(channel_1, channel_2)
             .map_err(|e| e.to_string())
     })
 }
 
+// Command `0x2D` -- TODO
+#[tauri::command]
+pub async fn unlock_device(
+    state: State<'_, AppState>,
+    id: u64,
+    password: String,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .unlock_device(&password)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x2F`
+#[tauri::command]
+pub async fn lock_device(
+    state: State<'_, AppState>,
+    id: u64,
+    password: String,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .lock_device(&password)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x30`
 #[tauri::command]
 pub async fn set_compressor(
     state: State<'_, AppState>,
@@ -233,112 +271,7 @@ pub async fn set_compressor(
     })
 }
 
-#[tauri::command]
+// Command `0x31`
-pub async fn set_limiter(
-    state: State<'_, AppState>,
-    id: u64,
-    channel: types::OutputChannel,
-    threshold: f32,
-    attack: u16,
-    release: u16,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_limiter(channel, threshold, attack, release)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_delay_unit(
-    state: State<'_, AppState>,
-    id: u64,
-    unit: types::DelayUnit,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device.dsp.set_delay_unit(unit).map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_delay(
-    state: State<'_, AppState>,
-    id: u64,
-    channel: types::Channel,
-    delay: f32,
-    unit: DelayUnit,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_delay(channel, delay, unit)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_matrix_routing(
-    state: State<'_, AppState>,
-    id: u64,
-    output: types::OutputChannel,
-    inputs: Vec<types::InputChannel>,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_matrix_routing(output, inputs)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_matrix_gain(
-    state: State<'_, AppState>,
-    id: u64,
-    input_channel: types::InputChannel,
-    output_channel: types::OutputChannel,
-    gain: f32,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_matrix_gain(input_channel, output_channel, gain)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_geq_band(
-    state: State<'_, AppState>,
-    id: u64,
-    input_channel: types::InputChannel,
-    frequency_band: types::DiscreteFrequency,
-    gain: f32,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_geq_band(input_channel, frequency_band, gain)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn set_geq_bypass(
-    state: State<'_, AppState>,
-    id: u64,
-    input_channel: types::InputChannel,
-    bypass: bool,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .set_geq_bypass(input_channel, bypass)
-            .map_err(|e| e.to_string())
-    })
-}
-
 #[tauri::command]
 pub async fn set_low_pass(
     state: State<'_, AppState>,
@@ -355,6 +288,7 @@ pub async fn set_low_pass(
     })
 }
 
+// Command `0x32`
 #[tauri::command]
 pub async fn set_high_pass(
     state: State<'_, AppState>,
@@ -371,6 +305,7 @@ pub async fn set_high_pass(
     })
 }
 
+// Command `0x33`
 #[tauri::command]
 pub async fn set_peq_band(
     state: State<'_, AppState>,
@@ -391,47 +326,78 @@ pub async fn set_peq_band(
     })
 }
 
+// Command `0x34`
 #[tauri::command]
-pub async fn store_current_configuration(
+pub async fn set_channel_gain(
     state: State<'_, AppState>,
     id: u64,
-    preset_index: usize,
+    channel: dsp_thomann::dsp408::types::Channel,
-    force: bool,
+    db: f32,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        let r = device
+            .dsp
+            .set_channel_gain(channel, db)
+            .map_err(|e| e.to_string())?;
+
+        Ok(r)
+    })
+}
+
+// Command `0x35`
+#[tauri::command]
+pub async fn set_mute(
+    state: State<'_, AppState>,
+    id: u64,
+    channel: dsp_thomann::dsp408::types::Channel,
+    muted: bool,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        let r = device
+            .dsp
+            .set_mute(channel, muted)
+            .map_err(|e| e.to_string())?;
+
+        Ok(r)
+    })
+}
+
+// Command `0x36`
+#[tauri::command]
+pub async fn set_channel_inverse_gain(
+    state: State<'_, AppState>,
+    id: u64,
+    channel: dsp_thomann::dsp408::types::Channel,
+    inverted: bool,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        let r = device
+            .dsp
+            .set_channel_inverse_gain(channel, inverted)
+            .map_err(|e| e.to_string())?;
+
+        Ok(r)
+    })
+}
+
+// Command `0x38`
+#[tauri::command]
+pub async fn set_delay(
+    state: State<'_, AppState>,
+    id: u64,
+    channel: types::Channel,
+    delay: f32,
+    unit: DelayUnit,
 ) -> Result<bool, String> {
     state.with_device_mut(id, |device| {
         device
             .dsp
-            .store_current_configuration(preset_index, force)
+            .set_delay(channel, delay, unit)
-            .map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn factory_reset(
-    state: State<'_, AppState>,
-    id: u64,
-    force: bool,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device.dsp.factory_reset(force).map_err(|e| e.to_string())
-    })
-}
-
-#[tauri::command]
-pub async fn copy_channel(
-    state: State<'_, AppState>,
-    id: u64,
-    channel_1: types::Channel,
-    channel_2: types::Channel,
-) -> Result<bool, String> {
-    state.with_device_mut(id, |device| {
-        device
-            .dsp
-            .copy_channel(channel_1, channel_2)
             .map_err(|e| e.to_string())
     })
 }
 
+// Command `0x39`
 #[tauri::command]
 pub async fn set_input_source(
     state: State<'_, AppState>,
@@ -446,6 +412,23 @@ pub async fn set_input_source(
     })
 }
 
+// Command `0x3A`
+#[tauri::command]
+pub async fn set_matrix_routing(
+    state: State<'_, AppState>,
+    id: u64,
+    output: types::OutputChannel,
+    inputs: Vec<types::InputChannel>,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_matrix_routing(output, inputs)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x3B`
 #[tauri::command]
 pub async fn link_channels(
     state: State<'_, AppState>,
@@ -461,6 +444,7 @@ pub async fn link_channels(
     })
 }
 
+// Command `0x3C`
 #[tauri::command]
 pub async fn set_bypass_peq(
     state: State<'_, AppState>,
@@ -476,6 +460,7 @@ pub async fn set_bypass_peq(
     })
 }
 
+// Command `0x3D` -- TODO
 #[tauri::command]
 pub async fn set_channel_name(
     state: State<'_, AppState>,
@@ -490,3 +475,101 @@ pub async fn set_channel_name(
             .map_err(|e| e.to_string())
     })
 }
+
+// Command `0x3E`
+#[tauri::command]
+pub async fn set_gate(
+    state: State<'_, AppState>,
+    id: u64,
+    channel: types::InputChannel,
+    threshold: f32,
+    attack: u16,
+    hold: u16,
+    release: u16,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_gate(channel, threshold, attack, hold, release)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x3F`
+#[tauri::command]
+pub async fn set_limiter(
+    state: State<'_, AppState>,
+    id: u64,
+    channel: types::OutputChannel,
+    threshold: f32,
+    attack: u16,
+    release: u16,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_limiter(channel, threshold, attack, release)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x40`
+#[tauri::command]
+pub async fn get_meter_levels(
+    state: State<'_, AppState>,
+    id: u64,
+) -> Result<(types::InputMeters, types::OutputMeters), String> {
+    state.with_device_mut(id, |device| {
+        device.dsp.get_meter_levels().map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x41`
+#[tauri::command]
+pub async fn set_matrix_gain(
+    state: State<'_, AppState>,
+    id: u64,
+    input_channel: types::InputChannel,
+    output_channel: types::OutputChannel,
+    gain: f32,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_matrix_gain(input_channel, output_channel, gain)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x48`
+#[tauri::command]
+pub async fn set_geq_band(
+    state: State<'_, AppState>,
+    id: u64,
+    input_channel: types::InputChannel,
+    frequency_band: types::DiscreteFrequency,
+    gain: f32,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_geq_band(input_channel, frequency_band, gain)
+            .map_err(|e| e.to_string())
+    })
+}
+
+// Command `0x49`
+#[tauri::command]
+pub async fn set_geq_bypass(
+    state: State<'_, AppState>,
+    id: u64,
+    input_channel: types::InputChannel,
+    bypass: bool,
+) -> Result<bool, String> {
+    state.with_device_mut(id, |device| {
+        device
+            .dsp
+            .set_geq_bypass(input_channel, bypass)
+            .map_err(|e| e.to_string())
+    })
+}

src-tauri/src/lib.rs

@@ -11,6 +11,7 @@ pub fn run() {
         .invoke_handler(tauri::generate_handler![
             commands::create_dsp408,
             commands::remove_dsp408,
+            commands::get_dsp_snapshot,
             commands::get_dsp_state,
             commands::connect_dsp408,    // 0x10
             commands::disconnect_dsp408, // 0x11
@@ -20,6 +21,8 @@ pub fn run() {
             commands::factory_reset,     // 0x23
             commands::set_current_preset_name, // 0x26
             commands::copy_channel,      // 0x2A
+            commands::unlock_device,     // Command `0x2D`
+            commands::lock_device,       // Command `0x2F`
             commands::set_compressor,    // 0x30
             commands::set_low_pass,      // 0x31
             commands::set_high_pass,     // 0x32

src-tauri/tauri.conf.json

@@ -12,9 +12,9 @@
   "app": {
     "windows": [
       {
-        "title": "thomann-dsp-app",
+        "title": "Thomann DSP Controller",
-        "width": 1200,
+        "width": 1600,
-        "height": 800,
+        "height": 950,
         "minWidth": 1200,
         "minHeight": 600
       }
@@ -27,11 +27,11 @@
     "active": true,
     "targets": "all",
     "icon": [
-      "icons/32x32.png",
+      "./icons/32x32.png",
-      "icons/128x128.png",
+      "./icons/128x128.png",
-      "icons/128x128@2x.png",
+      "./icons/128x128@2x.png",
-      "icons/icon.icns",
+      "./icons/icon.icns",
-      "icons/icon.ico"
+      "./icons/icon.ico"
     ]
   }
 }

src/App.tsx

@@ -1,6 +1,6 @@
 import { useState, useEffect, useRef } from 'react';
 import './App.css';
-import { DSP, AppPage } from './types';
+import { DSP, AppPage, isConnected } from './types';
 import TopBar from './components/Topbar/Topbar';
 import DSPPage from './pages/DspPage/DspPage';
 import AddDSPForm from './pages/AddDspPage/AddDspPage';
@@ -17,7 +17,7 @@ function App() {
   const [selected, setSelected] = useState<number | null>(null);
   const [page, setPage] = useState<AppPage>('home');
   const { notifications, notify, removeNotification, hoverNotification } = useNotifications();
-  const connectedDspCount = dsps.filter((dsp) => dsp.status === 'connected').length;
+  const connectedDspCount = dsps.filter((dsp) => isConnected(dsp)).length;
 
   const activeDsp = dsps.find((d) => d.id === selected) ?? null;
   const activeInstance = activeDsp ? createDSPInstance(activeDsp, setDsps, notify) : null;

src/assets/icons/AudioIcons.tsx

@@ -84,3 +84,152 @@ export function TextIcon({
     </svg>
   );
 }
+
+export function SlidersVerticalIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path d="M10 8H14" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M12 21V12" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M12 8V3" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+
+      <path d="M17 16H21" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M19 12V3" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M19 21V16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+
+      <path d="M3 14H7" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M5 10V3" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+      <path d="M5 21V14" stroke="currentColor" strokeWidth="2" strokeLinecap="round" />
+    </svg>
+  );
+}
+
+export function BoltIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16Z"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <circle cx="12" cy="12" r="4" stroke="currentColor" strokeWidth="2" />
+    </svg>
+  );
+}
+
+export function GainIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M3 12H7M17 12H21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <path
+        d="M7 4.5L17 12L7 19.5V4.5Z"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+export function GateIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M3 3V21H21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        opacity="0.35"
+      />
+      <path
+        d="M3 21H12L20 5"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+export function CompressorIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M3 3V21H21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        opacity="0.35"
+      />
+      <path
+        d="M3 21L11 13L21 8"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+export function LimiterIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M3 3V21H21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        opacity="0.35"
+      />
+      <path
+        d="M3 21L11 8H21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+export function DelayIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M4 5V19M12 8.5V15.5M20 11V13"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+export function MatrixIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path d="M3 7C11 7 11 4 21 4" />
+      <path d="M3 7C11 7 11 20 21 20" />
+      <path d="M3 17C11 17 11 12 21 12" />
+      <circle cx="3" cy="7" r="1.6" fill="none" />
+      <circle cx="3" cy="17" r="1.6" fill="none" />
+      <circle cx="21" cy="4" r="1.6" fill="none" />
+      <circle cx="21" cy="12" r="1.6" fill="none" />
+      <circle cx="21" cy="20" r="1.6" fill="none" />
+    </svg>
+  );
+}

src/assets/icons/EyesIcons.tsx

@@ -0,0 +1,42 @@
+export function EyeIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M2 12C2 12 5.5 5 12 5C18.5 5 22 12 22 12C22 12 18.5 19 12 19C5.5 19 2 12 2 12Z"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <circle cx="12" cy="12" r="3" stroke="currentColor" strokeWidth="2" />
+    </svg>
+  );
+}
+
+export function EyeOffIcon(props: React.SVGProps<SVGSVGElement>) {
+  return (
+    <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
+      <path
+        d="M3 3L21 21"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <path
+        d="M10.6 5.2C11.05 5.07 11.52 5 12 5C18.5 5 22 12 22 12C22 12 20.7 14.6 18.3 16.5M6.2 6.2C3.5 8.1 2 12 2 12C2 12 5.5 19 12 19C13.2 19 14.3 18.8 15.3 18.4"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <path
+        d="M9.9 9.9C9.35 10.45 9 11.2 9 12C9 13.66 10.34 15 12 15C12.8 15 13.55 14.65 14.1 14.1"
+        stroke="currentColor"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}

src/assets/icons/Triangle.tsx

@@ -2,7 +2,7 @@ export function TriangleUpIcon(props: React.SVGProps<SVGSVGElement>) {
   return (
     <svg viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
       <path
-        d="M8 3L13 10H3L8 3Z"
+        d="M8 3L2 12H14L8 3Z"
         stroke="currentColor"
         strokeWidth="1.5"
         fill="transparent"
@@ -16,7 +16,7 @@ export function TriangleDownIcon(props: React.SVGProps<SVGSVGElement>) {
   return (
     <svg viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" {...props}>
       <path
-        d="M8 13L3 6H13L8 13Z"
+        d="M8 13L2 4H14L8 13Z"
         stroke="currentColor"
         strokeWidth="1.5"
         fill="transparent"

src/components/Button/Button.css

@@ -2,23 +2,21 @@
   display: flex;
   align-items: center;
   justify-content: center;
-
   box-sizing: border-box;
 
   min-height: var(--card-control-height);
-
   padding: 0 var(--space-4);
 
   border: var(--border-width) solid transparent;
   border-radius: var(--radius-sm);
 
   font-family: var(--font-ui);
-  font-size: var(--font-md);
+  font-size: 13px;
   font-weight: var(--font-weight-medium);
 
   cursor: pointer;
-
+  user-select: none;
-  font-size: 13px;
+  -webkit-user-select: none;
 }
 
 .btn:disabled {
@@ -26,27 +24,54 @@
   cursor: not-allowed;
 }
 
+/* ------------------------------------------------------------------ */
+/* Variants                                                           */
+/* ------------------------------------------------------------------ */
+
 .btn-primary {
   background: var(--accent-brand);
   color: var(--bg-void);
 }
 
+/* Ghost + Toggle */
 .btn-ghost,
-.btn-toggle,
+.btn-toggle {
-.btn-outline {
   background: transparent;
   border-color: var(--border-hairline);
   color: var(--text-muted);
 }
 
+/* Outline */
+.btn-outline {
+  background: transparent;
+  border-color: var(--accent-brand);
+  color: #fff;
+}
+
+/* ------------------------------------------------------------------ */
+/* Hover                                                              */
+/* ------------------------------------------------------------------ */
+
+.btn-primary:hover:not(:disabled) {
+  background: color-mix(in srgb, var(--accent-brand) 95%, white);
+  color: var(--text-primary);
+}
+
 .btn-ghost:hover:not(:disabled),
-.btn-toggle:hover:not(:disabled),
+.btn-toggle:hover:not(:disabled) {
-.btn-outline:hover:not(:disabled) {
   background: var(--bg-raised);
   color: var(--text-primary);
 }
 
-/* Active toggle states */
+.btn-outline:hover:not(:disabled) {
+  border-color: var(--accent-brand);
+  color: var(--text-muted);
+}
+
+/* ------------------------------------------------------------------ */
+/* Active toggle states                                                */
+/* ------------------------------------------------------------------ */
+
 .btn-toggle.active-info {
   background: var(--accent-brand);
   border-color: var(--accent-brand);
@@ -65,7 +90,10 @@
   color: var(--bg-void);
 }
 
-/* Optional: active state hover */
+/* ------------------------------------------------------------------ */
+/* Active toggle hover                                                 */
+/* ------------------------------------------------------------------ */
+
 .btn-toggle.active-info:hover:not(:disabled) {
   background: var(--accent-brand);
   border-color: var(--accent-brand);

src/components/ChannelGroup/ChannelGroup.css

@@ -1,18 +1,21 @@
 .channel-group {
   position: relative;
-  /* flex: 1 1 0; */
-  min-height: 0;
 
+  flex: 0 0 auto;
+  width: fit-content;
+  min-width: 0;
+
+  min-height: 0;
   display: flex;
 
   border: var(--border-width) solid var(--border-hairline);
   border-radius: var(--radius-md);
-
   padding: 6cqh var(--space-3) 1cqh;
   margin-bottom: 1cqh;
   margin-top: 1cqh;
+
   box-sizing: border-box;
-  overflow: visible; /* in case something upstream set hidden */
+  overflow: visible;
 }
 
 .channel-group__label {
@@ -36,6 +39,9 @@
   display: flex;
   flex-direction: row;
   align-items: stretch;
+
+  width: fit-content;
   height: 100%;
+
   gap: var(--space-1);
 }

src/components/ChoiceSelect/ChoiceSelect.css

@@ -0,0 +1,125 @@
+/* ChoiceSelect.css */
+.choice-select {
+  position: relative;
+  display: flex;
+
+  color: var(--accent-brand);
+}
+
+.choice-select[data-disabled] {
+  opacity: 0.5;
+}
+
+.choice-select__trigger {
+  flex: 1 1 auto;
+  width: 100%;
+  height: 100%;
+
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+
+  padding: 0;
+  padding-inline: 5%;
+
+  background: transparent;
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+
+  font-family: var(--font-ui);
+  font-size: 90%;
+
+  color: inherit;
+
+  cursor: pointer;
+  transition: border-color var(--dur-base) var(--ease-standard);
+}
+
+.choice-select__trigger:hover,
+.choice-select__trigger--open {
+  border-color: var(--accent-brand);
+}
+
+.choice-select__trigger:disabled {
+  cursor: not-allowed;
+}
+
+.choice-select__label {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.choice-select__chevron {
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  width: 4cqh;
+  aspect-ratio: 1;
+
+  color: var(--accent-brand);
+  transition: transform var(--dur-base) var(--ease-standard);
+}
+
+.choice-select__trigger--open .choice-select__chevron {
+  transform: rotate(180deg);
+}
+
+.choice-select__chevron svg {
+  width: 50%;
+  height: auto;
+  display: block;
+}
+
+.choice-select__option {
+  padding: 1%;
+  border-radius: var(--radius-sm);
+  font-size: 100%;
+  color: var(--text-primary);
+  cursor: pointer;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.choice-select__option--highlight {
+  background: var(--bg-raised);
+}
+
+.choice-select__option--selected {
+  color: var(--accent-brand);
+  font-weight: var(--font-weight-semibold);
+}
+
+.choice-select__listbox {
+  position: absolute;
+  left: 0;
+  right: 0;
+  z-index: 40;
+
+  top: calc(100% + var(--space-1));
+
+  margin: 0;
+  padding: var(--space-1);
+  list-style: none;
+
+  background: var(--bg-panel);
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
+
+  max-height: 240px;
+  overflow-y: auto;
+}
+
+.choice-select__listbox--up {
+  top: auto;
+  bottom: calc(100% + var(--space-1));
+}
+
+.choice-select__listbox--portal {
+  position: fixed;
+  z-index: 1000; /* clear of any local stacking contexts in the panel */
+}

src/components/ChoiceSelect/ChoiceSelect.tsx

@@ -0,0 +1,232 @@
+// ChoiceSelect.tsx
+import { useEffect, useRef, useState } from 'react';
+import { createPortal } from 'react-dom';
+import { TriangleDownIcon } from '../../assets/icons/Triangle';
+import './ChoiceSelect.css';
+
+type ChoiceSelectProps<T extends string> = {
+  value: T;
+  options: readonly T[];
+  formatLabel?: (value: T) => string;
+  onChange: (value: T) => void;
+  id?: string;
+  disabled?: boolean;
+  className?: string;
+  style?: React.CSSProperties;
+};
+
+const LISTBOX_MAX_HEIGHT = 240; // keep in sync with .choice-select__listbox max-height
+const LISTBOX_GAP = 4; // px, ~= var(--space-1)
+
+type Coords = { top: number; left: number; width: number; fontSize: number };
+
+function ChoiceSelect<T extends string>({
+  value,
+  options,
+  formatLabel = (v) => v,
+  onChange,
+  id,
+  disabled,
+  className = '',
+  style,
+}: ChoiceSelectProps<T>) {
+  const [open, setOpen] = useState(false);
+  const [highlight, setHighlight] = useState(0);
+  const [dropUp, setDropUp] = useState(false);
+  const [coords, setCoords] = useState<Coords | null>(null);
+
+  const rootRef = useRef<HTMLDivElement>(null);
+  const triggerRef = useRef<HTMLButtonElement>(null);
+  const listboxRef = useRef<HTMLUListElement>(null);
+  const suppressNextClick = useRef(false);
+
+  useEffect(() => {
+    function handleMouseDown(e: MouseEvent) {
+      const target = e.target as Node;
+      const clickedOutside =
+        rootRef.current &&
+        !rootRef.current.contains(target) &&
+        !listboxRef.current?.contains(target);
+
+      if (clickedOutside && open) {
+        setOpen(false);
+        suppressNextClick.current = true;
+      }
+    }
+
+    function handleClickCapture(e: MouseEvent) {
+      if (suppressNextClick.current) {
+        e.preventDefault();
+        e.stopPropagation();
+        suppressNextClick.current = false;
+      }
+    }
+
+    document.addEventListener('mousedown', handleMouseDown);
+    document.addEventListener('click', handleClickCapture, true); // capture phase
+    return () => {
+      document.removeEventListener('mousedown', handleMouseDown);
+      document.removeEventListener('click', handleClickCapture, true);
+    };
+  }, [open]);
+
+  // Re-check placement/position on scroll/resize while open — the trigger's
+  // position can change (e.g. inside a scrollable panel), and since the
+  // listbox is portaled it won't move with it automatically.
+  useEffect(() => {
+    if (!open) return;
+    const recalc = () => updatePlacement();
+    window.addEventListener('scroll', recalc, true);
+    window.addEventListener('resize', recalc);
+    return () => {
+      window.removeEventListener('scroll', recalc, true);
+      window.removeEventListener('resize', recalc);
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open]);
+
+  const step = (direction: 1 | -1) => {
+    const currentIndex = options.indexOf(value);
+    if (currentIndex === -1 || options.length === 0) return;
+    const nextIndex = (currentIndex + direction + options.length) % options.length;
+    onChange(options[nextIndex]);
+  };
+
+  function updatePlacement() {
+    const el = triggerRef.current;
+    if (!el) return;
+
+    const rect = el.getBoundingClientRect();
+    const spaceBelow = window.innerHeight - rect.bottom;
+    const spaceAbove = rect.top;
+    const needsFlip = spaceBelow < LISTBOX_MAX_HEIGHT && spaceAbove > spaceBelow;
+    setDropUp(needsFlip);
+
+    // Capture the trigger's resolved font-size (its cqh has already resolved
+    // correctly here, since it's still inside the real container tree) and
+    // carry it as a plain px value into the portal, where cqh would break.
+    const fontSize = parseFloat(getComputedStyle(el).fontSize);
+
+    setCoords({
+      top: needsFlip ? rect.top - LISTBOX_GAP : rect.bottom + LISTBOX_GAP,
+      left: rect.left,
+      width: rect.width,
+      fontSize,
+    });
+  }
+
+  function openList() {
+    if (disabled) return;
+    updatePlacement();
+    setOpen(true);
+    const idx = options.indexOf(value);
+    setHighlight(idx >= 0 ? idx : 0);
+  }
+
+  function pick(opt: T) {
+    if (opt !== value) onChange(opt);
+    setOpen(false);
+    triggerRef.current?.focus();
+  }
+
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (disabled) return;
+
+    if (!open) {
+      if (e.key === 'Enter' || e.key === ' ' || e.key === 'ArrowDown') {
+        e.preventDefault();
+        openList();
+      }
+      return;
+    }
+
+    if (e.key === 'ArrowDown' || (e.key === 'Tab' && !e.shiftKey)) {
+      e.preventDefault();
+      setHighlight((h) => Math.min(h + 1, options.length - 1));
+    } else if (e.key === 'ArrowUp' || (e.key === 'Tab' && e.shiftKey)) {
+      e.preventDefault();
+      setHighlight((h) => Math.max(h - 1, 0));
+    } else if (e.key === 'Enter' || e.key === ' ') {
+      e.preventDefault();
+      pick(options[highlight]);
+    } else if (e.key === 'Escape') {
+      e.preventDefault();
+      setOpen(false);
+      triggerRef.current?.focus();
+    }
+  }
+
+  return (
+    <div
+      className={`choice-select ${className}`}
+      data-disabled={disabled || undefined}
+      ref={rootRef}
+      style={style}
+    >
+      <button
+        id={id}
+        type="button"
+        ref={triggerRef}
+        className={'choice-select__trigger' + (open ? ' choice-select__trigger--open' : '')}
+        onClick={() => (open ? setOpen(false) : openList())}
+        onKeyDown={handleKeyDown}
+        onWheel={(e) => {
+          e.preventDefault();
+          if (disabled) return;
+          if (e.deltaY < 0) step(-1);
+          else if (e.deltaY > 0) step(1);
+        }}
+        disabled={disabled}
+        aria-haspopup="listbox"
+        aria-expanded={open}
+      >
+        <span className="choice-select__label">{formatLabel(value)}</span>
+        <span className="choice-select__chevron" aria-hidden="true">
+          <TriangleDownIcon />
+        </span>
+      </button>
+
+      {open &&
+        coords &&
+        createPortal(
+          <ul
+            ref={listboxRef}
+            className={
+              'choice-select__listbox choice-select__listbox--portal' +
+              (dropUp ? ' choice-select__listbox--up' : '')
+            }
+            role="listbox"
+            style={{
+              fontSize: coords.fontSize,
+              left: coords.left,
+              width: coords.width,
+              // dropUp needs top: auto + bottom instead, see CSS note below
+              ...(dropUp
+                ? { top: 'auto', bottom: window.innerHeight - coords.top }
+                : { top: coords.top }),
+            }}
+          >
+            {options.map((option, i) => (
+              <li
+                key={option}
+                role="option"
+                aria-selected={option === value}
+                className={
+                  'choice-select__option' +
+                  (option === value ? ' choice-select__option--selected' : '') +
+                  (i === highlight ? ' choice-select__option--highlight' : '')
+                }
+                onMouseEnter={() => setHighlight(i)}
+                onClick={() => pick(option)}
+              >
+                {formatLabel(option)}
+              </li>
+            ))}
+          </ul>,
+          document.body
+        )}
+    </div>
+  );
+}
+
+export default ChoiceSelect;

src/components/ChoiceStepper/ChoiceStepper.css

@@ -5,7 +5,6 @@
   position: relative;
   display: flex;
   align-items: stretch;
-  justify-content: center;
 
   border: var(--border-width) solid var(--border-hairline);
   border-radius: var(--radius-sm);
@@ -17,17 +16,14 @@
   min-width: 0;
   width: 100%;
 
-  font-family: var(--font-ui);
+  font-family: var(--font-mono);
-  font-size: 3cqh;
+  font-size: var(--font--sm);
-  font-weight: var(--font-weight-semibold);
+  font-weight: var(--font-weight-normal);
-  text-align: center;
+  text-align: left;
 
   color: var(--accent-brand);
-
   background: transparent;
   border: none;
-  border-radius: var(--radius-sm);
-  padding: 0.5ch;
 
   white-space: nowrap;
   overflow: hidden;
@@ -40,20 +36,21 @@
 
 .choice-stepper__arrows {
   flex: 0 0 auto;
+  align-self: stretch;
+
   display: flex;
   flex-direction: column;
   justify-content: center;
-  gap: 0.5cqh;
 
   height: 100%;
   box-sizing: border-box;
-  padding: 1cqh;
+
-  padding-left: 0;
+  padding-right: 1%;
 }
 
 .choice-stepper__arrow-btn {
-  aspect-ratio: 1;
+  height: 50%;
-  height: 4.5cqh;
+  min-width: 0;
   min-height: 0;
 
   display: flex;
@@ -61,10 +58,11 @@
   justify-content: center;
 
   padding: 0;
-  color: var(--accent-brand);
 
+  color: var(--accent-brand);
   background: transparent;
-  border-radius: 1cqh;
+  border: none;
+  border-radius: var(--radius-md);
 
   cursor: pointer;
 }
@@ -75,6 +73,20 @@
 }
 
 .choice-stepper__arrow-btn svg {
-  width: 100%;
+  display: block;
   height: 100%;
 }
+
+.choice-stepper[data-disabled] {
+  opacity: 0.45;
+  filter: grayscale(1);
+}
+
+.choice-stepper__input:disabled {
+  cursor: not-allowed;
+}
+
+.choice-stepper[data-disabled] .choice-stepper__input,
+.choice-stepper[data-disabled] .choice-stepper__arrow-btn {
+  color: var(--border-hairline);
+}

src/components/ChoiceStepper/ChoiceStepper.tsx

@@ -1,54 +1,218 @@
-import { useEffect, useState } from 'react';
+import { JSX, useEffect, useRef, useState } from 'react';
 import Button from '../Button/Button';
 import { TriangleUpIcon, TriangleDownIcon } from '../../assets/icons/Triangle';
 import './ChoiceStepper.css';
 
-type ChoiceStepperProps<T> = {
+const WHEEL_COMMIT_DELAY = 250;
+// Safety net: if the parent's `value` prop never comes back exactly equal
+// to what we committed (rounding, an intermediate transform, etc.), stop
+// waiting after this long so the stepper doesn't get stuck ignoring
+// external updates.
+const PENDING_FALLBACK_MS = 1000;
+
+type CommitResult = Promise<boolean | void> | boolean | void;
+
+function useNonPassiveWheel(
+  ref: React.RefObject<HTMLElement | null>,
+  handler: (e: WheelEvent) => void
+) {
+  const handlerRef = useRef(handler);
+  handlerRef.current = handler;
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+
+    const listener = (e: WheelEvent) => handlerRef.current(e);
+    el.addEventListener('wheel', listener, { passive: false });
+    return () => el.removeEventListener('wheel', listener);
+  }, [ref]);
+}
+
+function StepperArrows({
+  onUp,
+  onDown,
+  canUp,
+  canDown,
+  disabled,
+}: {
+  onUp: () => void;
+  onDown: () => void;
+  canUp: boolean;
+  canDown: boolean;
+  disabled?: boolean;
+}) {
+  return (
+    <div className="choice-stepper__arrows">
+      <Button
+        variant="toggle"
+        className="choice-stepper__arrow-btn"
+        onClick={onUp}
+        disabled={disabled || !canUp}
+      >
+        <TriangleUpIcon />
+      </Button>
+      <Button
+        variant="toggle"
+        className="choice-stepper__arrow-btn"
+        onClick={onDown}
+        disabled={disabled || !canDown}
+      >
+        <TriangleDownIcon />
+      </Button>
+    </div>
+  );
+}
+
+// ---- List variant ----
+
+type ChoiceStepperListProps<T> = {
   value: T;
   values: readonly T[];
   formatLabel: (value: T) => string;
-  onChange: (value: T) => void;
+  onChange: (value: T) => CommitResult;
+  id?: string;
+  disabled?: boolean;
+  className?: string;
 };
 
-function ChoiceStepper<T>({ value, values, formatLabel, onChange }: ChoiceStepperProps<T>) {
+function ChoiceStepperList<T>({
-  const index = values.indexOf(value);
+  value,
-
+  values,
-  const canUp = index === -1 || index < values.length - 1;
+  formatLabel,
-  const canDown = index > 0;
+  onChange,
-
+  id,
+  disabled,
+  className,
+}: ChoiceStepperListProps<T>) {
+  const [localValue, setLocalValue] = useState(value);
   const [text, setText] = useState(formatLabel(value));
 
+  // True from the moment a commit starts until the prop `value` we get from
+  // the parent actually reflects it (not just until onChange resolves —
+  // those are two different moments and the gap between them is what was
+  // causing the old-value blink).
+  const interacting = useRef(false);
+  // The value we're waiting to see echoed back via the `value` prop.
+  const pendingValue = useRef<T | null>(null);
+  const wheelTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const fallbackTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useNonPassiveWheel(inputRef, (e) => {
+    e.preventDefault();
+
+    if (e.deltaY < 0 && canUp) {
+      stepWheel(1);
+    } else if (e.deltaY > 0 && canDown) {
+      stepWheel(-1);
+    }
+  });
+
   useEffect(() => {
+    if (interacting.current) {
+      // Only release control once the prop actually catches up to what we
+      // committed — otherwise keep showing localValue as-is (no flash back
+      // to the stale old value in between).
+      if (pendingValue.current !== null && Object.is(value, pendingValue.current)) {
+        interacting.current = false;
+        pendingValue.current = null;
+        if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+      } else {
+        return;
+      }
+    }
+    setLocalValue(value);
     setText(formatLabel(value));
   }, [value, formatLabel]);
 
-  const step = (direction: 1 | -1) => {
+  useEffect(() => {
-    const currentIndex = index === -1 ? 0 : index;
+    return () => {
+      if (wheelTimeout.current) clearTimeout(wheelTimeout.current);
+      if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+    };
+  }, []);
 
-    const nextIndex = Math.min(values.length - 1, Math.max(0, currentIndex + direction));
+  const index = values.indexOf(localValue);
+  const canUp = index === -1 || index < values.length - 1;
+  const canDown = index > 0;
 
-    if (nextIndex !== currentIndex) {
+  const stepLocal = (direction: 1 | -1): T | null => {
-      onChange(values[nextIndex]);
+    const currentIndex = values.indexOf(localValue);
+    if (currentIndex === -1) return null;
+
+    const nextIndex = currentIndex + direction;
+    if (nextIndex < 0 || nextIndex >= values.length) return null;
+
+    const next = values[nextIndex];
+    setLocalValue(next);
+    setText(formatLabel(next));
+    return next;
+  };
+
+  async function commit(next: T) {
+    interacting.current = true;
+    pendingValue.current = next;
+
+    const result = await onChange(next);
+
+    if (result === false) {
+      interacting.current = false;
+      pendingValue.current = null;
+      if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+      setLocalValue(value);
+      setText(formatLabel(value));
+      return;
     }
+
+    // Accepted: don't clear `interacting` here. Wait for the prop-sync
+    // effect above to see `value === next` and release it, so we never
+    // hand control back to a still-stale prop. Guard with a timeout in
+    // case it never matches exactly.
+    if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+    fallbackTimeout.current = setTimeout(() => {
+      interacting.current = false;
+      pendingValue.current = null;
+    }, PENDING_FALLBACK_MS);
+  }
+
+  const stepAndCommit = (direction: 1 | -1) => {
+    const next = stepLocal(direction);
+    if (next !== null) void commit(next);
+  };
+
+  const stepWheel = (direction: 1 | -1) => {
+    const next = stepLocal(direction);
+    if (next === null) return;
+
+    interacting.current = true;
+    if (wheelTimeout.current) clearTimeout(wheelTimeout.current);
+    wheelTimeout.current = setTimeout(() => {
+      wheelTimeout.current = null;
+      void commit(next);
+    }, WHEEL_COMMIT_DELAY);
   };
 
   const commitText = () => {
     const match = values.find(
       (v) => formatLabel(v).trim().toLowerCase() === text.trim().toLowerCase()
     );
-
     if (match !== undefined) {
-      onChange(match);
+      setLocalValue(match);
+      void commit(match);
     } else {
       setText(formatLabel(value));
     }
   };
 
   return (
-    <div className="choice-stepper">
+    <div className={`choice-stepper ${className ?? ''}`} data-disabled={disabled || undefined}>
       <input
+        ref={inputRef}
+        id={id}
         className="choice-stepper__input"
         value={text}
+        disabled={disabled}
         onChange={(e) => setText(e.target.value)}
         onBlur={commitText}
         onKeyDown={(e) => {
@@ -56,35 +220,208 @@ function ChoiceStepper<T>({ value, values, formatLabel, onChange }: ChoiceSteppe
             e.currentTarget.blur();
           } else if (e.key === 'ArrowUp') {
             e.preventDefault();
-            step(1);
+            interacting.current = true;
+            stepLocal(1);
           } else if (e.key === 'ArrowDown') {
             e.preventDefault();
-            step(-1);
+            interacting.current = true;
+            stepLocal(-1);
           }
         }}
+        onKeyUp={(e) => {
+          if (e.key !== 'ArrowUp' && e.key !== 'ArrowDown') return;
+          void commit(localValue);
+        }}
+      />
+      <StepperArrows
+        onUp={() => stepAndCommit(1)}
+        onDown={() => stepAndCommit(-1)}
+        canUp={canUp}
+        canDown={canDown}
+        disabled={disabled}
       />
-
-      <div className="choice-stepper__arrows">
-        <Button
-          variant="toggle"
-          className="choice-stepper__arrow-btn"
-          onClick={() => step(1)}
-          disabled={!canUp}
-        >
-          <TriangleUpIcon />
-        </Button>
-
-        <Button
-          variant="toggle"
-          className="choice-stepper__arrow-btn"
-          onClick={() => step(-1)}
-          disabled={!canDown}
-        >
-          <TriangleDownIcon />
-        </Button>
-      </div>
     </div>
   );
 }
 
+// ---- Range variant (concrete, no generic) ----
+
+type ChoiceStepperRangeProps = {
+  value: number;
+  min: number;
+  max: number;
+  step?: number;
+  formatLabel: (value: number) => string;
+  onChange: (value: number) => CommitResult;
+  id?: string;
+  disabled?: boolean;
+  className?: string;
+};
+
+function ChoiceStepperRange({
+  value,
+  min,
+  max,
+  step: stepSize = 1,
+  formatLabel,
+  onChange,
+  id,
+  disabled,
+  className,
+}: ChoiceStepperRangeProps) {
+  const [localValue, setLocalValue] = useState(value);
+  const [text, setText] = useState(formatLabel(value));
+
+  const interacting = useRef(false);
+  const pendingValue = useRef<number | null>(null);
+  const wheelTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const fallbackTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useNonPassiveWheel(inputRef, (e) => {
+    e.preventDefault();
+
+    if (e.deltaY < 0 && canUp) {
+      stepWheel(1);
+    } else if (e.deltaY > 0 && canDown) {
+      stepWheel(-1);
+    }
+  });
+
+  useEffect(() => {
+    if (interacting.current) {
+      if (pendingValue.current !== null && Object.is(value, pendingValue.current)) {
+        interacting.current = false;
+        pendingValue.current = null;
+        if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+      } else {
+        return;
+      }
+    }
+    setLocalValue(value);
+    setText(formatLabel(value));
+  }, [value, formatLabel]);
+
+  useEffect(() => {
+    return () => {
+      if (wheelTimeout.current) clearTimeout(wheelTimeout.current);
+      if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+    };
+  }, []);
+
+  const clamp = (n: number) => Math.min(max, Math.max(min, n));
+
+  const canUp = localValue < max;
+  const canDown = localValue > min;
+
+  const stepLocal = (direction: 1 | -1): number | null => {
+    const next = clamp(localValue + direction * stepSize);
+    if (next === localValue) return null;
+    setLocalValue(next);
+    setText(formatLabel(next));
+    return next;
+  };
+
+  async function commit(next: number) {
+    interacting.current = true;
+    pendingValue.current = next;
+
+    const result = await onChange(next);
+
+    if (result === false) {
+      interacting.current = false;
+      pendingValue.current = null;
+      if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+      setLocalValue(value);
+      setText(formatLabel(value));
+      return;
+    }
+
+    if (fallbackTimeout.current) clearTimeout(fallbackTimeout.current);
+    fallbackTimeout.current = setTimeout(() => {
+      interacting.current = false;
+      pendingValue.current = null;
+    }, PENDING_FALLBACK_MS);
+  }
+
+  const stepAndCommit = (direction: 1 | -1) => {
+    const next = stepLocal(direction);
+    if (next !== null) void commit(next);
+  };
+
+  const stepWheel = (direction: 1 | -1) => {
+    const next = stepLocal(direction);
+    if (next === null) return;
+
+    interacting.current = true;
+    if (wheelTimeout.current) clearTimeout(wheelTimeout.current);
+    wheelTimeout.current = setTimeout(() => {
+      wheelTimeout.current = null;
+      void commit(next);
+    }, WHEEL_COMMIT_DELAY);
+  };
+
+  const commitText = () => {
+    const parsed = Number(text);
+    if (Number.isFinite(parsed)) {
+      const next = clamp(parsed);
+      setLocalValue(next);
+      void commit(next);
+    } else {
+      setText(formatLabel(value));
+    }
+  };
+
+  return (
+    <div className={`choice-stepper ${className ?? ''}`} data-disabled={disabled || undefined}>
+      <input
+        ref={inputRef}
+        id={id}
+        className="choice-stepper__input"
+        value={text}
+        disabled={disabled}
+        onChange={(e) => setText(e.target.value)}
+        onBlur={commitText}
+        onKeyDown={(e) => {
+          if (e.key === 'Enter') {
+            e.currentTarget.blur();
+          } else if (e.key === 'ArrowUp') {
+            e.preventDefault();
+            if (canUp) {
+              interacting.current = true;
+              stepLocal(1);
+            }
+          } else if (e.key === 'ArrowDown') {
+            e.preventDefault();
+            if (canDown) {
+              interacting.current = true;
+              stepLocal(-1);
+            }
+          }
+        }}
+        onKeyUp={(e) => {
+          if (e.key !== 'ArrowUp' && e.key !== 'ArrowDown') return;
+          void commit(localValue);
+        }}
+      />
+      <StepperArrows
+        onUp={() => stepAndCommit(1)}
+        onDown={() => stepAndCommit(-1)}
+        canUp={canUp}
+        canDown={canDown}
+        disabled={disabled}
+      />
+    </div>
+  );
+}
+
+function ChoiceStepper<T>(props: ChoiceStepperListProps<T>): JSX.Element;
+function ChoiceStepper(props: ChoiceStepperRangeProps): JSX.Element;
+function ChoiceStepper(props: ChoiceStepperListProps<unknown> | ChoiceStepperRangeProps) {
+  if ('values' in props) {
+    return <ChoiceStepperList {...props} />;
+  }
+  return <ChoiceStepperRange {...props} />;
+}
+
 export default ChoiceStepper;

src/components/LinearGraph/LinearGraph.tsx

@@ -33,7 +33,7 @@ export interface LinearGraphProps {
   yMin: number;
   yMax: number;
   yStep?: number;
-  /** 'log' requires xMin > 0. Ticks are drawn at 1/2/5-per-decade mantissas, with decade (power-of-10) lines highlighted. */
+  /** 'log' requires xMin > 0. */
   xScale?: AxisScale;
   /** 'log' requires yMin > 0. */
   yScale?: AxisScale;
@@ -55,7 +55,7 @@ export interface LinearGraphProps {
 const defaultFormat = (v: number) => {
   if (Math.abs(v) < 1e-9) return '0';
   const abs = Math.abs(v);
-  if (abs >= 1000 || abs < 0.01) return v.toExponential(1);
+  if (abs >= 100000 || abs < 0.01) return v.toExponential(1);
   return parseFloat(v.toFixed(4)).toString();
 };
 
@@ -150,7 +150,7 @@ export const LinearGraph = forwardRef<LinearGraphHandle, LinearGraphProps>(funct
     const topBase = cq.h * 3;
     const rightBase = cq.w * 5;
     const bottomBase = cq.h * 4;
-    const leftBase = cq.w * 2;
+    const leftBase = cq.w * 7;
     const xLabelSpace = xLabel ? cq.h * 7 : 0;
     const yLabelSpace = yLabel ? Math.min(cq.w * 6, 24) : 0;
 
@@ -221,7 +221,7 @@ export const LinearGraph = forwardRef<LinearGraphHandle, LinearGraphProps>(funct
     ctx.clearRect(0, 0, cssW, cssH);
 
     const plot = {
-      x: pad.left + cq.w * 2,
+      x: pad.left,
       y: pad.top,
       width: Math.max(1, cssW - pad.left - pad.right - cq.w * 2),
       height: Math.max(1, cssH - pad.top - pad.bottom),
@@ -271,14 +271,14 @@ export const LinearGraph = forwardRef<LinearGraphHandle, LinearGraphProps>(funct
       ctx.fillRect(plot.x, plot.y, plot.width, plot.height);
     }
 
-    const clipPad = 2;
+    const borderInset = 1; // Avoid clipping outside graph bounds
     ctx.save();
     ctx.beginPath();
     ctx.rect(
-      plot.x - clipPad,
+      plot.x + borderInset,
-      plot.y - clipPad,
+      plot.y + borderInset,
-      plot.width + clipPad * 2,
+      plot.width - borderInset * 2,
-      plot.height + clipPad * 2
+      plot.height - borderInset * 2
     );
     ctx.clip();
 

src/components/MeterBar/MeterBar.css

@@ -3,6 +3,9 @@
   flex-direction: column;
   align-items: left;
   gap: 0.3cqh;
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .meter-bar__title {

src/components/Notifications/Notifications.css

@@ -1,7 +1,7 @@
 .notifications {
   position: fixed;
   right: var(--space-5);
-  bottom: var(--space-5);
+  top: var(--space-5);
   z-index: 9999;
 
   display: flex;

src/components/Sidebar/Sidebar.css

@@ -18,6 +18,9 @@
   overflow: visible;
 
   transition: width var(--dur-base) var(--ease-standard);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .sidebar-rail--expanded {
@@ -32,13 +35,14 @@
   justify-content: center;
 
   flex: 0 0 auto;
+  gap: var(--space-1);
   padding: var(--space-1);
   height: var(--header-height);
 }
 
 .sidebar-rail--expanded .sidebar-header {
   justify-content: space-between;
-  padding-inline: var(--space-3);
+  padding-left: var(--space-3);
 }
 
 .sidebar-toggle {
@@ -361,3 +365,54 @@
 .app-root--sidebar-expanded .stage--with-sidebar {
   margin-left: var(--sidebar-width-expanded);
 }
+
+/* ---------- Item (editing state) ---------- */
+
+.sidebar-item--editing {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: var(--sidebar-item-gap);
+
+  aspect-ratio: 1;
+  height: calc(var(--header-height) * 0.7);
+
+  border: none;
+
+  background: transparent;
+  padding: 0;
+}
+
+.sidebar-item-input {
+  width: 0;
+  flex: 1 1 auto;
+  min-width: 0;
+
+  appearance: none;
+  -webkit-appearance: none;
+  background: transparent;
+  border: none;
+  outline: none;
+  box-shadow: none;
+
+  text-align: center;
+
+  color: var(--text-primary);
+  font-family: var(--font-ui);
+  font-size: var(--font-sm);
+  font-weight: var(--font-weight-semibold);
+
+  opacity: 0;
+  max-width: 0;
+
+  transition:
+    opacity var(--dur-fast) var(--ease-standard),
+    max-width var(--dur-base) var(--ease-standard);
+}
+
+.sidebar-rail--expanded .sidebar-item-input {
+  width: auto;
+  opacity: 1;
+  max-width: 200px;
+  border: none;
+}

src/components/Sidebar/Sidebar.tsx

@@ -6,6 +6,7 @@ export type SidebarItem<T extends string = string> = {
   id: T;
   label: string;
   icon: React.ReactNode;
+  editable?: boolean;
 };
 
 export type SidebarAppOption = {
@@ -17,11 +18,75 @@ function SidebarButton<T extends string>({
   item,
   active,
   onSelect,
+  onRename,
 }: {
   item: SidebarItem<T>;
   active: boolean;
   onSelect: () => void;
+  onRename?: (name: string) => void;
 }) {
+  const [editing, setEditing] = useState(false);
+  const [inputValue, setInputValue] = useState(item.label);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (!editing) setInputValue(item.label);
+  }, [item.label, editing]);
+
+  function startEditing(e: React.MouseEvent) {
+    e.stopPropagation();
+    if (!onRename) return;
+
+    setInputValue(item.label);
+    setEditing(true);
+
+    requestAnimationFrame(() => {
+      inputRef.current?.focus();
+      inputRef.current?.select();
+    });
+  }
+
+  function commitRename() {
+    setEditing(false);
+
+    const trimmed = inputValue.trim();
+
+    if (!trimmed || trimmed === item.label) {
+      setInputValue(item.label);
+      return;
+    }
+
+    onRename?.(trimmed);
+  }
+
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (e.key === 'Enter') inputRef.current?.blur();
+
+    if (e.key === 'Escape') {
+      setInputValue(item.label);
+      setEditing(false);
+    }
+  }
+
+  if (editing) {
+    return (
+      <div className="sidebar-item sidebar-item--editing">
+        <span className="sidebar-icon">{item.icon}</span>
+
+        <input
+          ref={inputRef}
+          className="sidebar-item-input"
+          value={inputValue}
+          maxLength={8}
+          onChange={(e) => setInputValue(e.target.value.slice(0, 8))}
+          onBlur={commitRename}
+          onKeyDown={handleKeyDown}
+          aria-label="Rename channel"
+        />
+      </div>
+    );
+  }
+
   return (
     <button
       onClick={onSelect}
@@ -31,7 +96,14 @@ function SidebarButton<T extends string>({
       className={'sidebar-item' + (active ? ' sidebar-item--active' : '')}
     >
       <span className="sidebar-icon">{item.icon}</span>
-      <span className="sidebar-label">{item.label}</span>
+
+      <span
+        className="sidebar-label"
+        onDoubleClick={onRename ? startEditing : undefined}
+        title={onRename ? `${item.label} (double click to rename)` : undefined}
+      >
+        {item.label}
+      </span>
     </button>
   );
 }
@@ -46,8 +118,8 @@ function AppCombobox({
   appOptions: SidebarAppOption[];
   selectedAppId?: string;
   appName: string;
-  onAppChange?: (id: string) => void;
+  onAppChange: (id: string) => void;
-  onAppRename?: (name: string) => void;
+  onAppRename: (name: string) => void;
 }) {
   const currentOption = appOptions.find((o) => o.id === selectedAppId) ?? appOptions[0];
   const canRename = currentOption?.id !== 'f00';
@@ -95,6 +167,7 @@ function AppCombobox({
 
     if (!canRename) return;
 
+    setInputValue((currentOption?.name ?? appName).trim());
     setEditing(true);
     setOpen(false);
 
@@ -124,13 +197,13 @@ function AppCombobox({
 
     if (matched) {
       if (matched.id !== selectedAppId) {
-        onAppChange?.(matched.id);
+        onAppChange(matched.id);
       }
       return;
     }
 
     if (trimmed !== currentOption?.name) {
-      onAppRename?.(trimmed);
+      onAppRename(trimmed);
     }
   }
 
@@ -186,6 +259,7 @@ function AppCombobox({
           onKeyDown={handleKeyDown}
           aria-haspopup="listbox"
           aria-expanded={open}
+          title={canRename ? 'Double click to rename' : undefined}
         >
           <span className="sidebar-app-trigger-label">{currentOption?.name ?? appName}</span>
           <svg className="sidebar-app-trigger-caret" viewBox="0 0 24 24" width="14" height="14">
@@ -209,7 +283,8 @@ function AppCombobox({
               onMouseEnter={() => setHighlight(i)}
               onClick={() => pick(opt)}
             >
-              {opt.name}
+              <span className="sidebar-app-option-id">{opt.id + '-'}</span>
+              <span>{opt.name}</span>
             </li>
           ))}
         </ul>
@@ -227,6 +302,7 @@ export function Sidebar<T extends string>({
   selectedAppId,
   onAppChange,
   onAppRename,
+  onItemRename,
   expanded,
   onToggle,
 }: {
@@ -236,8 +312,9 @@ export function Sidebar<T extends string>({
   appName: string;
   appOptions?: SidebarAppOption[];
   selectedAppId?: string;
-  onAppChange?: (id: string) => void;
+  onAppChange: (id: string) => void;
-  onAppRename?: (name: string) => void;
+  onAppRename: (name: string) => void;
+  onItemRename?: (id: T, name: string) => void;
   expanded: boolean;
   onToggle: () => void;
 }) {
@@ -295,6 +372,9 @@ export function Sidebar<T extends string>({
             item={item}
             active={activeId === item.id}
             onSelect={() => onSelect(item.id)}
+            onRename={
+              item.editable && onItemRename ? (name) => onItemRename(item.id, name) : undefined
+            }
           />
         ))}
       </div>

src/components/SignalFlowMatrix/SignalFlowMatrix.tsx

@@ -1,4 +1,4 @@
-import { useMemo } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import { InputChannel, OutputChannel } from '../../features/dsp408/types';
 import { DSP408 } from '../../types';
 import {
@@ -69,6 +69,14 @@ const MARGIN = 36;
 const LEFT_CHAIN_W = 560;
 const RIGHT_CHAIN_W = 620;
 
+// Width of the invisible "hitbox" stroke drawn under each visible line, in SVG
+// user units. Much wider than the visible 1–2.5px line so it's easy to click
+// or catch with a scroll wheel without needing pixel-perfect aim.
+const LINE_HITBOX_WIDTH = 14;
+
+// How long the gain tooltip stays visible after the last wheel tick, in ms.
+const GAIN_TOOLTIP_HOLD_MS = 700;
+
 function getRoutes(dsp: DSP408, output: OutputChannel) {
   return dsp.state.current_config.output_states[output].matrix_routes;
 }
@@ -79,16 +87,47 @@ function getGain(dsp: DSP408, output: OutputChannel, input: InputChannel) {
   return getRoutes(dsp, output).gains[input];
 }
 
+function formatGainDb(value: number) {
+  const sign = value > 0 ? '+' : '';
+  return `${sign}${value.toFixed(1)} dB`;
+}
+
+export function useNonPassiveWheel(
+  ref: React.RefObject<Element | null>,
+  handler: (e: WheelEvent) => void
+) {
+  const handlerRef = useRef(handler);
+  handlerRef.current = handler;
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+
+    const listener = (e: Event) => handlerRef.current(e as WheelEvent);
+    el.addEventListener('wheel', listener, { passive: false });
+    return () => el.removeEventListener('wheel', listener);
+  }, [ref]);
+}
+
+type GainTooltipState = {
+  visible: boolean;
+  x: number;
+  y: number;
+  label: string;
+};
+
 function SignalFlowMatrix({
   dsp,
   setMatrixRouting,
   setMatrixGain,
   setActiveSidebar,
+  onGainPreview,
 }: {
   dsp: DSP408;
   setMatrixRouting: (output: OutputChannel, inputs: InputChannel[]) => Promise<boolean>;
   setMatrixGain: (input: InputChannel, output: OutputChannel, gain: number) => Promise<boolean>;
   setActiveSidebar: React.Dispatch<React.SetStateAction<SidebarId>>;
+  onGainPreview: (input: InputChannel, output: OutputChannel, value: number | null) => void;
 }) {
   const nInputs = INPUT_ORDER.length;
   const nOutputs = OUTPUT_ORDER.length;
@@ -109,6 +148,27 @@ function SignalFlowMatrix({
   const inputNodeX = leftStart + LEFT_CHAIN_W;
   const outputNodeX = rightStart;
 
+  const [gainTooltip, setGainTooltip] = useState<GainTooltipState>({
+    visible: false,
+    x: 0,
+    y: 0,
+    label: '',
+  });
+  const hideTooltipTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const WHEEL_COMMIT_DELAY = 250;
+
+  // key = `${input}-${output}`
+  const pendingGains = useRef<Map<string, number>>(new Map());
+  const commitTimers = useRef<Map<string, ReturnType<typeof setTimeout>>>(new Map());
+
+  useEffect(() => {
+    return () => {
+      if (hideTooltipTimer.current) clearTimeout(hideTooltipTimer.current);
+      commitTimers.current.forEach(clearTimeout);
+    };
+  }, []);
+
   const handleToggle = (output: OutputChannel, input: InputChannel) => {
     const routes = getRoutes(dsp, output);
     const next = routes.connected.includes(input)
@@ -117,15 +177,55 @@ function SignalFlowMatrix({
     void setMatrixRouting(output, next);
   };
 
-  const handleWheelGain = (e: React.WheelEvent, output: OutputChannel, input: InputChannel) => {
+  const svgRef = useRef<SVGSVGElement>(null);
+
+  const handleWheelGain = (e: WheelEvent, output: OutputChannel, input: InputChannel) => {
     e.preventDefault();
-    const current = getGain(dsp, output, input);
+
+    const key = `${input}-${output}`;
+    // Base on the pending value if we're mid-wheel, otherwise the real state
+    const current = pendingGains.current.get(key) ?? getGain(dsp, output, input);
     const delta = e.deltaY < 0 ? MATRIX_GAIN_STEP : -MATRIX_GAIN_STEP;
     const next =
       Math.round(Math.min(MATRIX_GAIN_MAX, Math.max(MATRIX_GAIN_MIN, current + delta)) * 10) / 10;
-    void setMatrixGain(input, output, next);
+
+    pendingGains.current.set(key, next);
+    onGainPreview(input, output, next);
+
+    // Debounced send: only the final value goes out once the wheel pauses
+    const existing = commitTimers.current.get(key);
+    if (existing) clearTimeout(existing);
+    commitTimers.current.set(
+      key,
+      setTimeout(async () => {
+        commitTimers.current.delete(key);
+        const value = pendingGains.current.get(key);
+        if (value === undefined) return;
+        await setMatrixGain(input, output, value);
+        // Only release if the user hasn't wheeled again while we were awaiting
+        if (pendingGains.current.get(key) === value) {
+          pendingGains.current.delete(key);
+          onGainPreview(input, output, null);
+        }
+      }, WHEEL_COMMIT_DELAY)
+    );
+
+    // Tooltip (unchanged, shows the pending value)
+    if (hideTooltipTimer.current) clearTimeout(hideTooltipTimer.current);
+    setGainTooltip({ visible: true, x: e.clientX, y: e.clientY, label: formatGainDb(next) });
+    hideTooltipTimer.current = setTimeout(() => {
+      setGainTooltip((t) => ({ ...t, visible: false }));
+    }, GAIN_TOOLTIP_HOLD_MS);
   };
 
+  useNonPassiveWheel(svgRef, (e) => {
+    const hit = (e.target as Element).closest<SVGElement>('[data-wheel-route]');
+    if (!hit) return; // not over a connected line: let the page scroll normally
+    const { input, output } = hit.dataset;
+    if (!input || !output) return;
+    handleWheelGain(e, output as OutputChannel, input as InputChannel);
+  });
+
   const routePairs = useMemo(() => {
     const pairs: { input: InputChannel; output: OutputChannel; i: number; j: number }[] = [];
     OUTPUT_ORDER.forEach((output, j) => {
@@ -134,14 +234,27 @@ function SignalFlowMatrix({
     return pairs;
   }, []);
 
+  // Draw dashed (unconnected) links first so connected (solid) links always
+  // paint on top of them, regardless of input/output index order. This has
+  // to be recomputed whenever routing changes, since isRouted reads live
+  // dsp state — unlike routePairs above, which is just static index pairs.
+  const orderedRoutePairs = useMemo(() => {
+    return [...routePairs].sort((a, b) => {
+      const aConnected = isRouted(dsp, a.output, a.input) ? 1 : 0;
+      const bConnected = isRouted(dsp, b.output, b.input) ? 1 : 0;
+      return aConnected - bConnected;
+    });
+  }, [routePairs, dsp]);
+
   return (
     <div className="signal-flow">
       <svg
+        ref={svgRef}
         viewBox={`0 0 ${W} ${H}`}
         preserveAspectRatio="xMidYMid meet"
         className="signal-flow__svg"
       >
-        {routePairs.map(({ input, output, i, j }) => {
+        {orderedRoutePairs.map(({ input, output, i, j }) => {
           const connected = isRouted(dsp, output, input);
           const y1 = inputCenterY(i);
           const y2 = outputCenterY(j);
@@ -152,6 +265,22 @@ function SignalFlowMatrix({
 
           return (
             <g key={`${input}-${output}`}>
+              {/* Invisible wide-stroke hitbox: carries the click/wheel handlers so
+                  the line is easy to grab without needing to hit the thin visible
+                  stroke exactly. Sits directly under the visible path. */}
+              <path
+                d={path}
+                fill="none"
+                stroke="transparent"
+                strokeWidth={LINE_HITBOX_WIDTH}
+                style={{ cursor: 'pointer' }}
+                onClick={() => handleToggle(output, input)}
+                data-wheel-route={connected ? '' : undefined}
+                data-input={input}
+                data-output={output}
+              />
+              {/* Visible line, purely decorative — no pointer events, so it never
+                  competes with the hitbox above for hover/click/wheel. */}
               <path
                 d={path}
                 fill="none"
@@ -159,9 +288,7 @@ function SignalFlowMatrix({
                 strokeWidth={connected ? 2.5 : 1}
                 strokeDasharray={connected ? undefined : '4 5'}
                 opacity={connected ? 0.9 : 0.35}
-                style={{ cursor: 'pointer' }}
+                pointerEvents="none"
-                onClick={() => handleToggle(output, input)}
-                onWheel={connected ? (e) => handleWheelGain(e, output, input) : undefined}
               />
             </g>
           );
@@ -252,6 +379,30 @@ function SignalFlowMatrix({
           );
         })}
       </svg>
+
+      {gainTooltip.visible && (
+        <div
+          className="signal-flow__gain-tooltip"
+          style={{
+            position: 'fixed',
+            left: gainTooltip.x + 14,
+            top: gainTooltip.y - 28,
+            pointerEvents: 'none',
+            zIndex: 50,
+            padding: '2px 8px',
+            borderRadius: 6,
+            fontSize: 12,
+            fontVariantNumeric: 'tabular-nums',
+            background: 'var(--surface-elevated, rgba(20, 20, 24, 0.92))',
+            color: 'var(--text-primary, #fff)',
+            border: '1px solid var(--border-hairline, #333)',
+            boxShadow: '0 2px 8px rgba(0,0,0,0.35)',
+            whiteSpace: 'nowrap',
+          }}
+        >
+          {gainTooltip.label}
+        </div>
+      )}
     </div>
   );
 }

src/components/Topbar/Topbar.css

@@ -150,6 +150,9 @@
     (var(--space-3) * 2) + (var(--tab-height) * 0.5) + (var(--space-2) * 2) + 4ch +
       var(--tab-close-size)
   );
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .tab:hover {

src/components/Topbar/Topbar.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useRef } from 'react';
-import { DSP, AppPage } from '../../types';
+import { DSP, AppPage, isConnected } from '../../types';
 import AnimatedLogo from '../../assets/icons/AnimatedLogo';
 import { PlusIcon } from '../../assets/icons/PlusIcon';
 import { CrownIcon } from '../../assets/icons/CrownIcon';
@@ -24,6 +24,7 @@ function Tab({
   onRemove,
   onConnect,
   onDisconnect,
+  actions,
 }: {
   dsp: DSP;
   active: boolean;
@@ -33,8 +34,9 @@ function Tab({
   onRemove: () => void;
   onConnect: (dsp: DSP) => void;
   onDisconnect: (dsp: DSP) => void;
+  actions?: React.ReactNode;
 }) {
-  const isConnected = dsp.status === 'connected';
+  const isDspConnected = isConnected(dsp);
 
   const handleTabKeyDown = (e: React.KeyboardEvent<HTMLDivElement>) => {
     if (e.key === 'Enter' || e.key === ' ') {
@@ -58,24 +60,36 @@ function Tab({
       <button
         type="button"
         className="tab-led"
-        aria-label={isConnected ? `Disconnect ${dsp.name}` : `Connect ${dsp.name}`}
+        aria-label={isDspConnected ? `Disconnect ${dsp.name}` : `Connect ${dsp.name}`}
         onClick={(e) => {
           e.stopPropagation();
 
-          if (isConnected) {
+          onSelect();
+
+          if (isDspConnected) {
             onDisconnect(dsp);
           } else {
             onConnect(dsp);
           }
         }}
       >
-        <Led status={dsp.status} />
+        <Led
+          status={
+            dsp.isConnecting
+              ? 'connecting'
+              : isConnected(dsp)
+                ? 'connected'
+                : 'disconnected'
+          }
+        />
       </button>
 
       <span className="tab-name" title={dsp.name}>
         {dsp.name}
       </span>
 
+      {actions}
+
       <button
         type="button"
         className="tab-close"

src/components/VerticalSlider/VerticalSlider.css

@@ -9,6 +9,9 @@
   align-items: center;
 
   box-sizing: border-box;
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .gauge-track {
@@ -58,8 +61,6 @@
   height: 100%;
 
   cursor: pointer;
-  touch-action: none;
-  user-select: none;
 }
 
 .track {
@@ -145,3 +146,26 @@
   font-family: inherit;
   color: inherit;
 }
+
+.gauge-viewport.is-disabled {
+  opacity: 0.45;
+  filter: grayscale(1);
+}
+
+.gauge-viewport.is-disabled .slider {
+  cursor: not-allowed;
+}
+
+.gauge-viewport.is-disabled .thumb {
+  border-color: var(--border-hairline);
+  box-shadow: none;
+}
+
+.gauge-viewport.is-disabled .value {
+  color: var(--border-hairline);
+  box-shadow: none;
+}
+
+.value input:disabled {
+  cursor: not-allowed;
+}

src/components/VerticalSlider/VerticalSlider.tsx

@@ -10,32 +10,37 @@ type VerticalSliderProps = {
   max: number;
 
   step?: StepFn;
+  quantize?: QuantizeFn;
 
   /**
-   * Optional hard snap function applied after every value change (drag,
+   * Optional discrete value set (must be sorted ascending). When provided,
-   * keyboard, wheel, or typed input) — takes precedence over the built-in
+   * this takes full precedence over `step`/`quantize`/`scale`: the slider
-   * step-based rounding. Use this when the underlying hardware/DSP only
+   * only ever lands on entries from this array. `min`/`max` are used to
-   * accepts a fixed, non-uniformly-spaced set of values (e.g. a 0..N raw
+   * slice out the applicable sub-range of `values` (e.g. per-filter-type
-   * index mapped through a log curve) and the slider must always land on
+   * Q ranges that all share one master Q table) — both bounds should be
-   * one of those exact values rather than an interpolated approximation.
+   * exact members of `values`. Thumb position and drag/keyboard/wheel
-   * See makeLogQuantize().
+   * navigation are index-based rather than value-based, since spacing in
+   * the array need not be uniform or log-uniform.
    */
-  quantize?: QuantizeFn;
+  values?: readonly number[];
 
   value: number;
   onChange?: (value: number) => Promise<boolean>;
   onInput?: (value: number) => void;
 
-  unit?: string;
+  unit?: string | ((value: number) => string);
   formatValue?: (value: number, decimals: number) => string;
 
   showTicks?: boolean;
 
-  /** 'linear' (default) or 'log'. Log scale requires min > 0 and max > 0. */
+  /** 'linear' (default) or 'log'. Log scale requires min > 0 and max > 0. Ignored when `values` is set. */
   scale?: Scale;
 
   className?: string;
   style?: React.CSSProperties;
+
+  /** Greys out the slider and blocks all interaction. */
+  disabled?: boolean;
 };
 
 const defaultStep: StepFn = () => 0.1;
@@ -60,8 +65,36 @@ function safeLogBound(n: number) {
   return n > 0 ? n : Number.EPSILON;
 }
 
-/** Maps a real value to a 0..1 position, honoring the chosen scale. */
+/** Binary search for the index of the array entry closest to v. Assumes arr is sorted ascending and non-empty. */
-function valueToPercent(v: number, min: number, max: number, scale: Scale) {
+function closestIndex(arr: readonly number[], v: number) {
+  let lo = 0;
+  let hi = arr.length - 1;
+  if (v <= arr[0]) return 0;
+  if (v >= arr[hi]) return hi;
+
+  while (lo < hi) {
+    const mid = (lo + hi) >> 1;
+    if (arr[mid] === v) return mid;
+    if (arr[mid] < v) lo = mid + 1;
+    else hi = mid;
+  }
+
+  const a = arr[lo - 1];
+  const b = arr[lo];
+  return v - a <= b - v ? lo - 1 : lo;
+}
+
+/** Maps a real value to a 0..1 position, honoring the chosen scale (or index position within `list`). */
+function valueToPercent(
+  v: number,
+  min: number,
+  max: number,
+  scale: Scale,
+  list: readonly number[] | null
+) {
+  if (list && list.length > 1) {
+    return closestIndex(list, v) / (list.length - 1);
+  }
   if (scale === 'log') {
     const logMin = Math.log(safeLogBound(min));
     const logMax = Math.log(safeLogBound(max));
@@ -73,8 +106,18 @@ function valueToPercent(v: number, min: number, max: number, scale: Scale) {
   return (v - min) / (max - min);
 }
 
-/** Maps a 0..1 position back to a real value, honoring the chosen scale. */
+/** Maps a 0..1 position back to a real value, honoring the chosen scale (or nearest index within `list`). */
-function percentToValue(percent: number, min: number, max: number, scale: Scale) {
+function percentToValue(
+  percent: number,
+  min: number,
+  max: number,
+  scale: Scale,
+  list: readonly number[] | null
+) {
+  if (list && list.length > 1) {
+    const idx = Math.round(percent * (list.length - 1));
+    return list[Math.min(list.length - 1, Math.max(0, idx))];
+  }
   if (scale === 'log') {
     const logMin = Math.log(safeLogBound(min));
     const logMax = Math.log(safeLogBound(max));
@@ -126,6 +169,7 @@ export default function VerticalSlider({
   max,
   step = defaultStep,
   quantize,
+  values,
   value,
   onChange,
   onInput,
@@ -133,6 +177,7 @@ export default function VerticalSlider({
   formatValue,
   showTicks = true,
   scale = 'linear',
+  disabled = false,
   className,
   style,
 }: VerticalSliderProps) {
@@ -151,13 +196,21 @@ export default function VerticalSlider({
   const wheelCommitTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);
   const [tickCount, setTickCount] = useState(MIN_TICKS);
 
-  if (scale === 'log' && (min <= 0 || max <= 0)) {
+  if (scale === 'log' && !values && (min <= 0 || max <= 0)) {
     // eslint-disable-next-line no-console
     console.warn(
       'VerticalSlider: scale="log" requires min > 0 and max > 0. Falling back to linear behavior for out-of-range bounds.'
     );
   }
 
+  // Slice the discrete value set down to the applicable [min, max] sub-range.
+  // Falls back to the full array if the slice is empty (e.g. misconfigured bounds).
+  const listValues = useMemo(() => {
+    if (!values || values.length === 0) return null;
+    const filtered = values.filter((v) => v >= min && v <= max);
+    return filtered.length > 0 ? filtered : values;
+  }, [values, min, max]);
+
   useEffect(() => {
     if (
       dragging.current ||
@@ -191,16 +244,42 @@ export default function VerticalSlider({
     return () => observer.disconnect();
   }, []);
 
-  const decimals = useMemo(
+  useEffect(() => {
-    () => Math.min(3, getDecimals(step(displayValue))),
+    if (!disabled) return;
-    [step, displayValue]
+
-  );
+    dragging.current = false;
+    keyboardEditing.current = false;
+    keyboardValue.current = null;
+    wheelEditing.current = false;
+    wheelValue.current = null;
+    if (wheelCommitTimeout.current) {
+      clearTimeout(wheelCommitTimeout.current);
+      wheelCommitTimeout.current = null;
+    }
+
+    setEditingText(null);
+    setDisplayValue(value);
+    dragValue.current = value;
+    onInput?.(value);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [disabled]);
+
+  const decimals = useMemo(() => {
+    if (listValues) return Math.min(3, getDecimals(displayValue));
+    return Math.min(3, getDecimals(step(displayValue)));
+  }, [listValues, step, displayValue]);
 
   const formattedValue = (formatValue ?? formatValueDefault)(displayValue, decimals);
 
+  const displayUnit = typeof unit === 'function' ? unit(displayValue) : unit;
+
   function normalizeValue(input: number) {
     const clamped = Math.min(max, Math.max(min, input));
 
+    if (listValues) {
+      return listValues[closestIndex(listValues, clamped)];
+    }
+
     if (quantize) {
       return Number(Math.min(max, Math.max(min, quantize(clamped))).toFixed(6));
     }
@@ -218,6 +297,8 @@ export default function VerticalSlider({
   }
 
   function handleKeyDown(e: React.KeyboardEvent<HTMLDivElement>) {
+    if (disabled) return;
+
     if (!['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight'].includes(e.key)) {
       return;
     }
@@ -230,18 +311,30 @@ export default function VerticalSlider({
     // hasn't landed yet, `value` can still be stale, which made repeated
     // key presses appear to snap back to the pre-press position.
     const base = keyboardValue.current ?? displayValue;
-    const currentStep = step(base);
 
-    let next = base;
+    let next: number;
-    if (e.key === 'ArrowUp' || e.key === 'ArrowRight') next += currentStep;
+    if (listValues) {
-    if (e.key === 'ArrowDown' || e.key === 'ArrowLeft') next -= currentStep;
+      const idx = closestIndex(listValues, base);
+      let nextIdx = idx;
+      if (e.key === 'ArrowUp' || e.key === 'ArrowRight')
+        nextIdx = Math.min(listValues.length - 1, idx + 1);
+      if (e.key === 'ArrowDown' || e.key === 'ArrowLeft') nextIdx = Math.max(0, idx - 1);
+      next = listValues[nextIdx];
+    } else {
+      const currentStep = step(base);
+      next = base;
+      if (e.key === 'ArrowUp' || e.key === 'ArrowRight') next += currentStep;
+      if (e.key === 'ArrowDown' || e.key === 'ArrowLeft') next -= currentStep;
+      next = normalizeValue(next);
+    }
 
-    next = normalizeValue(next);
     keyboardValue.current = next;
     updateValue(next);
   }
 
   async function handleKeyUp() {
+    if (disabled) return;
+
     if (keyboardValue.current == null) return;
 
     const next = keyboardValue.current;
@@ -258,17 +351,26 @@ export default function VerticalSlider({
   }
 
   function handleWheel(e: WheelEvent) {
+    if (disabled) return;
     e.preventDefault();
 
     wheelEditing.current = true;
 
     const base = wheelValue.current ?? displayValue;
-    const currentStep = step(base);
     // deltaY < 0 means scrolling up/away from the user — treat that as
     // increasing the value, matching the vertical slider's "up = more".
     const direction = e.deltaY < 0 ? 1 : -1;
 
-    const next = normalizeValue(base + direction * currentStep);
+    let next: number;
+    if (listValues) {
+      const idx = closestIndex(listValues, base);
+      const nextIdx = Math.min(listValues.length - 1, Math.max(0, idx + direction));
+      next = listValues[nextIdx];
+    } else {
+      const currentStep = step(base);
+      next = normalizeValue(base + direction * currentStep);
+    }
+
     wheelValue.current = next;
     updateValue(next);
 
@@ -315,11 +417,13 @@ export default function VerticalSlider({
     if (!sliderRef.current) return;
     const rect = sliderRef.current.getBoundingClientRect();
     const percent = 1 - (clientY - rect.top) / rect.height;
-    const raw = percentToValue(percent, min, max, scale);
+    const raw = percentToValue(percent, min, max, scale, listValues);
     updateValue(raw);
   }
 
   function startDrag(e: React.PointerEvent<HTMLDivElement>) {
+    if (disabled) return;
+
     const target = e.currentTarget;
     dragging.current = true;
     target.setPointerCapture(e.pointerId);
@@ -354,6 +458,11 @@ export default function VerticalSlider({
   }
 
   async function commitEditing() {
+    if (disabled) {
+      setEditingText(null);
+      return;
+    }
+
     if (editingText !== null && editingText !== '' && editingText !== '-') {
       const parsed = Number(editingText);
 
@@ -376,10 +485,13 @@ export default function VerticalSlider({
     setEditingText(null);
   }
 
-  const percent = valueToPercent(displayValue, min, max, scale);
+  const percent = valueToPercent(displayValue, min, max, scale, listValues);
 
   return (
-    <div className={['gauge-viewport', className].filter(Boolean).join(' ')} style={style}>
+    <div
+      className={['gauge-viewport', disabled && 'is-disabled', className].filter(Boolean).join(' ')}
+      style={style}
+    >
       <div
         className={['gauge-track', !showTicks && 'no-ticks'].filter(Boolean).join(' ')}
         ref={trackRef}
@@ -395,7 +507,12 @@ export default function VerticalSlider({
         <div
           className="slider"
           ref={sliderRef}
-          tabIndex={0}
+          role="slider"
+          aria-disabled={disabled}
+          aria-valuemin={min}
+          aria-valuemax={max}
+          aria-valuenow={displayValue}
+          tabIndex={disabled ? -1 : 0}
           onKeyDown={handleKeyDown}
           onKeyUp={handleKeyUp}
           onPointerDown={startDrag}
@@ -421,6 +538,7 @@ export default function VerticalSlider({
           ref={inputRef}
           type="text"
           inputMode="decimal"
+          disabled={disabled}
           value={editingText ?? formattedValue}
           style={{ width: '100%' }}
           onFocus={() => setEditingText(value.toFixed(decimals))} // plain number while editing
@@ -434,7 +552,7 @@ export default function VerticalSlider({
             }
           }}
         />
-        {unit && <span className="value-unit">{unit}</span>}
+        {displayUnit && <span className="value-unit">{' ' + displayUnit}</span>}
       </div>
     </div>
   );

src/features/dsp408/components/ChannelSection/ChannelSection.css

@@ -1,5 +1,5 @@
 /* InputSection.css */
-.input-graph-section {
+.channel-graph-section {
   flex: 0 0 calc(100% - var(--dsp-control-heigth));
   min-height: 0;
 
@@ -10,9 +10,13 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
-.input-graph-panel {
+.channel-graph-panel {
+  position: relative;
   flex: 1 1 auto;
   min-width: 0;
   min-height: 0;
@@ -24,7 +28,28 @@
   border-radius: var(--radius-md);
 }
 
-.input-graph__title {
+.channel-bypass-overlay {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  pointer-events: none;
+  z-index: 2;
+}
+
+.channel-bypass-overlay span {
+  font-size: 8cqh;
+  font-weight: 800;
+  letter-spacing: 0.15em;
+  color: #f87171;
+  text-shadow: 0 0 12px rgba(0, 0, 0, 0.6);
+  transform: rotate(-8deg);
+  opacity: 0.85;
+  user-select: none;
+}
+
+.channel-graph__title {
   flex: 0 0 auto;
 
   text-align: center;
@@ -35,12 +60,15 @@
   font-weight: var(--font-weight-semibold);
 }
 
-.input-graph-panel > .container {
+.channel-graph-panel > .container {
   flex: 1;
   min-height: 0;
 }
 
-.input-control-section {
+/* Bottom control bar — same pattern as .compressor-section: absolute,
+   bottom-anchored, panels flow in a row and scroll horizontally instead
+   of squeezing into a fixed max-width. */
+.channel-control-section {
   container-type: size;
   position: absolute;
   left: 0;
@@ -50,7 +78,7 @@
   height: var(--dsp-control-heigth);
 
   display: flex;
-  align-items: center;
+  align-items: flex-end;
   justify-content: center;
 
   box-sizing: border-box;
@@ -60,110 +88,29 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
-.input-control-panel {
+.channel-control-panel {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  width: 100%;
+  gap: var(--space-2);
-  max-width: 60cqw;
+  overflow-x: auto;
-
+  justify-content: center;
-  display: flex;
-  align-items: stretch;
-  justify-content: center; /* ← add this */
-  gap: var(--space-4);
 
   box-sizing: border-box;
   padding: 2cqh;
 }
 
-.input-control-panel__sliders {
-  flex: 1 1 auto;
-  min-width: 0;
-
-  display: grid;
-  grid-template-columns: repeat(2, 1fr);
-  gap: 4cqh;
-}
-
-.input-control-panel__cell {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: flex-start;
-  min-height: 0;
-  min-width: 0;
-  gap: 1cqh;
-}
-
-.input-control-panel__cell-label {
-  flex: 0 0 auto;
-  font-family: var(--font-ui);
-  font-size: 2.5cqh;
-  color: var(--text-muted);
-  white-space: nowrap;
-}
-
-.input-control-panel__side {
-  flex: 0 0 auto;
-  width: 16cqh;
-
-  display: flex;
-  flex-direction: column;
-  justify-content: flex-end;
-  gap: 2cqh;
-}
-
-.input-control-panel__select {
-  display: flex;
-  flex-direction: column;
-  gap: 0.5cqh;
-}
-
-.input-control-panel__select-label {
-  font-family: var(--font-ui);
-  font-size: 2.2cqh;
-  color: var(--text-muted);
-}
-
-.input-control-panel__select select {
-  font-family: var(--font-ui);
-  font-size: 2.5cqh;
-  padding: 0.8cqh;
-  background: var(--bg-void);
-  color: var(--text-primary);
-  border: var(--border-width) solid var(--border-hairline);
-  border-radius: var(--radius-md);
-}
-
-.input-control-panel__select select:disabled {
-  opacity: 0.5;
-}
-
-.input-control-panel__bypass-btn {
-  font-family: var(--font-ui);
-  font-size: 2.5cqh;
-  font-weight: var(--font-weight-semibold);
-  padding: 1cqh;
-
-  background: var(--bg-void);
-  color: var(--text-primary);
-  border: var(--border-width) solid var(--border-hairline);
-  border-radius: var(--radius-md);
-  cursor: pointer;
-}
-
-.input-control-panel__bypass-btn--active {
-  background: var(--accent, #f87171);
-  color: var(--bg-void);
-  border-color: var(--accent, #f87171);
-}
-
 /* Peq Sliders */
-.input-panel {
+.channel-panel {
   position: relative;
-  height: 10;
+  height: 100%;
 
-  aspect-ratio: 0.75;
+  aspect-ratio: 0.8;
   flex: 0 0 auto;
 
   display: flex;
@@ -177,7 +124,7 @@
   background: var(--bg-void);
 }
 
-.input-panel__title {
+.channel-panel__title {
   flex: 0 0 auto;
   width: 100%;
   text-align: center;
@@ -193,7 +140,7 @@
   text-overflow: ellipsis;
 }
 
-.input-panel__grid {
+.channel-panel__grid {
   flex: 1 1 auto;
   min-height: 0;
 
@@ -207,7 +154,7 @@
   box-sizing: border-box;
 }
 
-.input-panel__cell {
+.channel-panel__cell {
   display: flex;
   flex-direction: column;
   align-items: center;
@@ -217,7 +164,7 @@
   gap: 1cqh;
 }
 
-.input-panel__cell-label {
+.channel-panel__cell-label {
   flex: 0 0 auto;
   font-family: var(--font-ui);
   font-size: 3.2cqh;
@@ -228,7 +175,7 @@
 .crossover-panel {
   position: relative;
   height: 100%;
-  aspect-ratio: 0.28;
+  aspect-ratio: 0.3;
   flex: 0 0 auto;
 
   display: flex;
@@ -260,15 +207,34 @@
   text-overflow: ellipsis;
 }
 
+/* Now the root of a ChoiceSelect rather than a native <select>. */
 .crossover-panel__select {
   flex: 0 0 auto;
   width: 85%;
   font-family: var(--font-ui);
-  font-size: 3cqh;
+}
-  padding: 1cqh;
+
-  background: var(--bg-panel);
+.crossover-panel__select .choice-select__input,
-  color: inherit;
+.crossover-panel__select .choice-select__input option {
-  border: var(--border-width) solid var(--border-hairline);
+  font-size: 4cqh;
+  color: var(--accent-brand);
+  /* padding-left: 1cqh; */
+}
+
+.crossover-panel__select {
+  flex: 0 0 auto;
+  width: 85%;
+  font-family: var(--font-ui);
+  font-size: 4cqh;
+}
+
+.crossover-panel__select .choice-select__input,
+.crossover-panel__select .choice-select__input option {
+  height: 100%;
+  padding: 0;
+  padding-left: 2cqh;
+  font-size: 4cqh;
+  color: var(--accent-brand);
   border-radius: var(--radius-sm);
 }
 
@@ -288,17 +254,16 @@
   padding: 1cqh;
 
   overflow: hidden;
-
-  aspect-ratio: 2;
 }
 
 .peq-band-list__row {
-  flex: 1 1 0;
+  flex: 1 1 auto;
+
   min-height: 0;
   min-width: 0;
 
   display: grid;
-  grid-template-columns: 1fr 1.2fr 1fr 1fr 1.4fr 1.2fr;
+  grid-template-columns: 0.4fr 0.55fr 0.4fr 0.5fr 1.2fr 0.5fr;
   align-items: stretch;
   gap: 1cqh;
 
@@ -340,8 +305,7 @@
   text-align: center;
 }
 
-.peq-band-list__input,
+.peq-band-list__input {
-.peq-band-list__select {
   width: 100%;
   height: 100%;
   min-width: 0;
@@ -361,3 +325,75 @@
 
   box-sizing: border-box;
 }
+
+.peq-band-list__stepper,
+.peq-band-list__select {
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+
+  font-family: var(--font-ui);
+  font-size: 4cqh;
+}
+
+.channel-graph-panel__magnitude-wrap {
+  flex: 1 1 0;
+  min-height: 0;
+  min-width: 0;
+  position: relative;
+}
+
+.channel-graph__title-row {
+  flex: 0 0 auto;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 1cqh 1.5cqh;
+}
+
+.channel-graph__title-row .channel-graph__title {
+  padding: 0; /* was on the standalone title element; row now owns spacing */
+}
+
+.channel-graph-view-toggle {
+  display: flex;
+  gap: 0.4cqh;
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+  padding: 0.3cqh;
+  background: var(--bg-void);
+}
+
+.channel-graph-view-toggle__btn {
+  font-family: var(--font-ui);
+  font-size: 2cqh;
+  padding: 0.6cqh 1.2cqh;
+  background: transparent;
+  color: var(--text-muted);
+  border: none;
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+}
+
+.channel-graph-view-toggle__btn.active {
+  background: var(--accent-brand);
+  color: var(--bg-void);
+}
+
+.peq-band-list__stepper .choice-stepper__input,
+.peq-band-list__select .choice-select__input {
+  height: 100%;
+  min-height: 0;
+
+  font-family: var(--font-mono);
+  font-size: 4cqh;
+  color: var(--accent-brand);
+
+  background: transparent;
+
+  text-align: center;
+  text-align-last: center;
+  padding: 0;
+  margin: 0;
+}

src/features/dsp408/components/ChannelSection/ChannelSection.tsx

@@ -0,0 +1,771 @@
+// ChannelSection.tsx
+import VerticalSlider, {
+  makeLogStep,
+  makeLogQuantize,
+} from '../../../../components/VerticalSlider/VerticalSlider';
+import ChoiceStepper from '../../../../components/ChoiceStepper/ChoiceStepper';
+import ChoiceSelect from '../../../../components/ChoiceSelect/ChoiceSelect';
+import {
+  CROSSOVER_FILTER_LABEL,
+  PEQ_BANDS_ORDER,
+  PEQ_FILTERS_LABEL,
+  PEQ_Q_RANGES,
+  PEAK_Q_VALUES,
+  PEQ_Q_UNUSED,
+  PEQ_GAIN_USED,
+} from '../../constants';
+import { Channel, PEQBand, PEQFilter, PEQ, Crossover } from '../../types';
+import { DSP408 as DSP } from '../../../../types';
+import { CrossoverFilter } from '../../types';
+import { LinearGraph, LinearGraphHandle } from '../../../../components/LinearGraph/LinearGraph';
+import { useRef, useState, useEffect } from 'react';
+import './ChannelSection.css';
+import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
+import Button from '../../../../components/Button/Button';
+import {
+  FREQUENCY_MAX,
+  FREQUENCY_MIN,
+  FREQUENCY_QUANTIZATION,
+  GRAPH_X_MAX,
+  GRAPH_X_MIN,
+  GRAPH_Y_MAX,
+  GRAPH_Y_MIN,
+} from '../../constants';
+import { drawCurves } from '../../utils/graph/draw';
+import { getPeqCurvePoints, getPeqPhasePoints } from '../../utils/graph/peq';
+import { logSpace, sumCurvePoints, sumPhaseCurvePoints } from '../../utils/graph/curve';
+import { getCrossoverCurvePoints, getCrossoverPhasePoints } from '../../utils/graph/crossover';
+
+function nearestQValue(q: number, values: readonly number[] = PEAK_Q_VALUES): number {
+  return values.reduce((nearest, current) =>
+    Math.abs(current - q) < Math.abs(nearest - q) ? current : nearest
+  );
+}
+
+type GraphView = 'both' | 'magnitude' | 'phase';
+
+function GraphViewToggle({
+  view,
+  onChange,
+}: {
+  view: GraphView;
+  onChange: (v: GraphView) => void;
+}) {
+  const options: { value: GraphView; label: string }[] = [
+    { value: 'both', label: 'Both' },
+    { value: 'magnitude', label: 'Mag' },
+    { value: 'phase', label: 'Phase' },
+  ];
+
+  return (
+    <div className="channel-graph-view-toggle">
+      {options.map((opt) => (
+        <button
+          key={opt.value}
+          type="button"
+          className={`channel-graph-view-toggle__btn${view === opt.value ? ' active' : ''}`}
+          onClick={() => onChange(opt.value)}
+        >
+          {opt.label}
+        </button>
+      ))}
+    </div>
+  );
+}
+
+function ChannelActions({
+  bypass,
+  resetting,
+  onBypass,
+  onReset,
+}: {
+  bypass: boolean;
+  resetting: boolean;
+  onBypass: () => void;
+  onReset: () => void;
+}) {
+  return (
+    <div className="geq-channel-selector">
+      <Button
+        variant="toggle"
+        className={bypass ? 'active-warning' : ''}
+        onClick={onBypass}
+        style={{
+          width: '100%',
+          fontSize: '3.5cqh',
+          paddingTop: '2cqh',
+          paddingBottom: '2cqh',
+          minHeight: 0,
+          whiteSpace: 'nowrap',
+        }}
+      >
+        {bypass ? 'Bypassed' : 'Bypass'}
+      </Button>
+
+      <Button
+        variant="toggle"
+        onClick={onReset}
+        disabled={resetting}
+        style={{
+          width: '100%',
+          fontSize: '3.5cqh',
+          paddingTop: '2cqh',
+          paddingBottom: '2cqh',
+          minHeight: 0,
+        }}
+      >
+        {resetting ? 'Resetting…' : 'Reset'}
+      </Button>
+    </div>
+  );
+}
+
+function PeqPanelSliders({
+  peq,
+  setPEQ,
+  onLiveValue,
+}: {
+  peq: PEQ;
+  setPEQ: (
+    gainDb: number,
+    freqHz: number,
+    q: number,
+    filterType: PEQFilter,
+    bypass: boolean
+  ) => Promise<boolean>;
+  onLiveValue: (value: PEQ) => void;
+}) {
+  const [qMin, qMax] = PEQ_Q_RANGES[peq.filter_type];
+  const qDisabled = PEQ_Q_UNUSED.has(peq.filter_type);
+  const gainDisabled = !PEQ_GAIN_USED.has(peq.filter_type);
+
+  const nearestQ = nearestQValue(peq.q);
+
+  const commit = (overrides: Partial<PEQ>) => {
+    const next = { ...peq, ...overrides };
+    return setPEQ(next.gain, next.frequency, overrides.q ?? nearestQ, next.filter_type, next.bypass);
+  };
+
+  return (
+    <div className="channel-panel">
+      <div className="channel-panel__title">PEQ Parameters</div>
+
+      <div className="channel-panel__grid">
+        <div className="channel-panel__cell channel-panel__cell--frequency">
+          <VerticalSlider
+            min={FREQUENCY_MIN}
+            max={FREQUENCY_MAX}
+            scale="log"
+            step={makeLogStep(FREQUENCY_MIN, FREQUENCY_MAX, FREQUENCY_QUANTIZATION)}
+            quantize={makeLogQuantize(FREQUENCY_MIN, FREQUENCY_MAX, FREQUENCY_QUANTIZATION)}
+            unit={(value) => (value >= 1000 ? 'kHz' : 'Hz')}
+            formatValue={(value) =>
+              value >= 1000 ? `${(value / 1000).toFixed(2)}` : `${value.toFixed(1)}`
+            }
+            value={peq.frequency}
+            onChange={(value) => commit({ frequency: value })}
+            onInput={(value) => onLiveValue({ ...peq, frequency: value })}
+            style={{ width: '100%', flex: '1 1 auto' }}
+          />
+
+          <div className="channel-panel__cell-label">Frequency</div>
+        </div>
+
+        <div className="channel-panel__cell channel-panel__cell--q">
+          <VerticalSlider
+            min={qMin}
+            max={qMax}
+            values={PEAK_Q_VALUES}
+            formatValue={(v) => v.toFixed(2)}
+            value={nearestQ}
+            onChange={(value) => commit({ q: value })}
+            onInput={(value) => onLiveValue({ ...peq, q: nearestQValue(value) })}
+            disabled={qDisabled}
+            style={{ width: '100%', flex: '1 1 auto' }}
+          />
+
+          <div className="channel-panel__cell-label">Q</div>
+        </div>
+
+        <div className="channel-panel__cell channel-panel__cell--gain">
+          <VerticalSlider
+            min={-12}
+            max={12}
+            step={() => 0.1}
+            unit="dB"
+            value={peq.gain}
+            formatValue={(v, d) => (v > 0 ? `+${v.toFixed(d)}` : v.toFixed(d))}
+            onChange={(value) => commit({ gain: value })}
+            onInput={(value) => onLiveValue({ ...peq, gain: value })}
+            disabled={gainDisabled}
+            style={{ width: '100%', flex: '1 1 auto' }}
+          />
+
+          <div className="channel-panel__cell-label">Gain</div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+function CrossoverPanel({
+  crossover,
+  title,
+  setCrossover,
+  onLiveValue,
+}: {
+  crossover: Crossover;
+  title: string;
+  setCrossover: (frequency: number, filter_type: CrossoverFilter) => Promise<boolean>;
+  onLiveValue: (value: number) => void;
+}) {
+  const frequency = crossover.frequency;
+  const filter_type = crossover.slope;
+  const bypass = filter_type === CrossoverFilter.Bypass;
+
+  const lastFilterType = useRef<CrossoverFilter>(
+    filter_type !== CrossoverFilter.Bypass ? filter_type : CrossoverFilter.Lk48
+  );
+
+  const commit = async (overrides: {
+    frequency?: number;
+    filter_type?: CrossoverFilter;
+    bypass?: boolean;
+  }) => {
+    const nextFrequency = overrides.frequency ?? frequency;
+
+    const selectedFilterType =
+      overrides.filter_type !== undefined
+        ? overrides.filter_type
+        : bypass
+          ? lastFilterType.current
+          : filter_type;
+
+    // Always remember the latest non-bypass selection.
+    if (selectedFilterType !== CrossoverFilter.Bypass) {
+      lastFilterType.current = selectedFilterType;
+    }
+
+    const nextBypass = overrides.bypass ?? bypass;
+
+    const nextFilterType = nextBypass ? CrossoverFilter.Bypass : selectedFilterType;
+
+    return setCrossover(nextFrequency, nextFilterType);
+  };
+
+  return (
+    <div className="crossover-panel">
+      <div className="crossover-panel__title">{title}</div>
+
+      <VerticalSlider
+        min={FREQUENCY_MIN}
+        max={FREQUENCY_MAX}
+        scale="log"
+        step={makeLogStep(FREQUENCY_MIN, FREQUENCY_MAX, FREQUENCY_QUANTIZATION)}
+        quantize={makeLogQuantize(FREQUENCY_MIN, FREQUENCY_MAX, FREQUENCY_QUANTIZATION)}
+        unit={(value) => (value >= 1000 ? 'kHz' : 'Hz')}
+        value={frequency}
+        formatValue={(value) =>
+          value >= 1000 ? `${(value / 1000).toFixed(2)}` : `${value.toFixed(1)}`
+        }
+        onChange={(value) => commit({ frequency: value })}
+        onInput={(value) => onLiveValue(value)}
+        style={{ width: '100%', flex: '1 1 auto' }}
+      />
+
+      <ChoiceSelect
+        className="crossover-panel__select"
+        value={bypass ? lastFilterType.current : filter_type}
+        options={CROSSOVER_FILTER_LABEL.map((opt) => opt.value)}
+        formatLabel={(v) =>
+          CROSSOVER_FILTER_LABEL.find((opt) => opt.value === v)?.label ?? String(v)
+        }
+        onChange={(value) => commit({ filter_type: value })}
+      />
+
+      <Button
+        variant="toggle"
+        className={bypass ? 'active-warning' : ''}
+        onClick={() => commit({ bypass: !bypass })}
+        style={{
+          width: '85%',
+          paddingLeft: 0,
+          paddingRight: 0,
+          fontSize: '4cqh',
+          paddingTop: '2cqh',
+          paddingBottom: '2cqh',
+          minHeight: 0,
+        }}
+      >
+        {bypass ? 'Bypassed' : 'Bypass'}
+      </Button>
+    </div>
+  );
+}
+
+function PeqBandList({
+  bands,
+  liveBands,
+  activeBand,
+  setActiveBand,
+  setPEQ,
+  bandsOrder,
+}: {
+  bands: Record<PEQBand, PEQ>;
+  liveBands: Partial<Record<PEQBand, PEQ>>;
+  activeBand: PEQBand;
+  setActiveBand: (band: PEQBand) => void;
+  setPEQ: (
+    band: PEQBand,
+    gainDb: number,
+    freqHz: number,
+    q: number,
+    filterType: PEQFilter,
+    bypass: boolean
+  ) => Promise<boolean>;
+  bandsOrder: PEQBand[];
+}) {
+  const commit = (band: PEQBand, overrides: Partial<PEQ>) => {
+    const live = liveBands[band] ?? bands[band];
+    const next = { ...live, ...overrides };
+    return setPEQ(
+      band,
+      next.gain,
+      next.frequency,
+      nearestQValue(next.q),
+      next.filter_type,
+      next.bypass
+    );
+  };
+
+  return (
+    <div className="peq-band-list">
+      <div className="peq-band-list__row peq-band-list__row--header">
+        <div className="peq-band-list__cell">Band</div>
+        <div className="peq-band-list__cell">Freq</div>
+        <div className="peq-band-list__cell">Q</div>
+        <div className="peq-band-list__cell">Gain</div>
+        <div className="peq-band-list__cell">Type</div>
+        <div className="peq-band-list__cell">Bypass</div>
+      </div>
+
+      {bandsOrder.map((band, i) => {
+        const peq = liveBands[band] ?? bands[band];
+        const isActive = band === activeBand;
+
+        const [qMin, qMax] = PEQ_Q_RANGES[peq.filter_type];
+        const qValues = PEAK_Q_VALUES.filter((q) => q >= qMin && q <= qMax);
+        const qValue = nearestQValue(peq.q, qValues.length ? qValues : PEAK_Q_VALUES);
+
+        const qDisabled = PEQ_Q_UNUSED.has(peq.filter_type);
+        const gainDisabled = !PEQ_GAIN_USED.has(peq.filter_type);
+
+        return (
+          <div
+            className={`peq-band-list__row${isActive ? ' peq-band-list__row--active' : ''}`}
+            key={band}
+          >
+            <Button
+              variant="toggle"
+              className={isActive ? 'active-info' : ''}
+              onClick={() => setActiveBand(band)}
+              style={{
+                minHeight: 0,
+                fontSize: '4cqh',
+              }}
+            >
+              {`B${i + 1}`}
+            </Button>
+
+            {/* Frequency */}
+            <ChoiceStepper
+              className="peq-band-list__stepper"
+              value={peq.frequency}
+              min={FREQUENCY_MIN}
+              max={FREQUENCY_MAX}
+              step={FREQUENCY_QUANTIZATION}
+              formatLabel={(v) =>
+                v >= 1000 ? `${(v / 1000).toFixed(2)} kHz` : `${v.toFixed(1)} Hz`
+              }
+              onChange={(value) => commit(band, { frequency: value })}
+            />
+
+            <ChoiceStepper
+              className="peq-band-list__stepper"
+              value={qValue}
+              values={qValues}
+              formatLabel={(v) => v.toFixed(2)}
+              disabled={qDisabled}
+              onChange={(value) => commit(band, { q: value })}
+            />
+
+            <ChoiceStepper
+              className="peq-band-list__stepper"
+              value={peq.gain}
+              min={-12}
+              max={12}
+              step={0.1}
+              formatLabel={(v) => `${v > 0 ? '+' : ''}${v.toFixed(1)} dB`}
+              disabled={gainDisabled}
+              onChange={(value) => commit(band, { gain: value })}
+            />
+
+            <ChoiceSelect<PEQFilter>
+              className="peq-band-list__select"
+              value={peq.filter_type}
+              options={PEQ_FILTERS_LABEL.map((opt) => opt.value)}
+              formatLabel={(v) =>
+                PEQ_FILTERS_LABEL.find((opt) => opt.value === v)?.label ?? String(v)
+              }
+              onChange={(value) => {
+                const [min, max] = PEQ_Q_RANGES[value];
+                const allowed = PEAK_Q_VALUES.filter((q) => q >= min && q <= max);
+                commit(band, {
+                  filter_type: value,
+                  q: nearestQValue(3.0, allowed.length ? allowed : PEAK_Q_VALUES),
+                });
+              }}
+            />
+
+            <Button
+              variant="toggle"
+              className={peq.bypass ? 'active-warning' : ''}
+              onClick={() => commit(band, { bypass: !peq.bypass })}
+              style={{ minHeight: 0, fontSize: '4cqh', paddingInline: 0 }}
+            >
+              {peq.bypass ? 'Bypassed' : 'Bypass'}
+            </Button>
+          </div>
+        );
+      })}
+    </div>
+  );
+}
+
+type SetFilterFn = (
+  channel: Channel,
+  freq: number,
+  filterType: CrossoverFilter
+) => Promise<boolean>;
+
+function ChannelSection({
+  dsp,
+  channel,
+  setHighPass,
+  setLowPass,
+  setPeq,
+  setPeqBypass,
+}: {
+  dsp: DSP;
+  channel: Channel;
+  setHighPass: SetFilterFn;
+  setLowPass: SetFilterFn;
+  setPeq: (
+    channel: Channel,
+    band: PEQBand,
+    gainDb: number,
+    freqHz: number,
+    q: number,
+    filterType: PEQFilter,
+    bypass: boolean
+  ) => Promise<boolean>;
+  setPeqBypass: (channel: Channel, bypass: boolean) => Promise<boolean>;
+}) {
+  // UI variables
+  const [activeBand, setActiveBand] = useState<PEQBand>(PEQBand.B1);
+  const [graphView, setGraphView] = useState<GraphView>('both');
+  const [resetting, setResetting] = useState(false);
+  const [isResetConfirmOpen, setIsResetConfirmOpen] = useState(false);
+
+  // Live values
+  const [liveHpFreq, setLiveHpFreq] = useState<number>(FREQUENCY_MIN);
+  const [liveLpFreq, setLiveLpFreq] = useState<number>(FREQUENCY_MAX);
+  const [livePeq, setLivePeq] = useState<Partial<Record<PEQBand, PEQ>>>({});
+
+  const magnitudeGraphRef = useRef<LinearGraphHandle>(null);
+
+  // DSP values
+  const isInput = 'Input' in channel;
+
+  const activeChannelState = isInput
+    ? dsp.state.current_config.input_states[channel.Input]
+    : dsp.state.current_config.output_states[channel.Output];
+  const ActiveHighPassFilter = activeChannelState.crossover.high_pass;
+  const ActiveLowPassFilter = activeChannelState.crossover.low_pass;
+  const ActivePeq = activeChannelState.peq_chain;
+
+  const bandsOrder = isInput ? PEQ_BANDS_ORDER.slice(0, -1) : PEQ_BANDS_ORDER;
+
+  useEffect(() => {
+    if (!isResetConfirmOpen) return;
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        setIsResetConfirmOpen(false);
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [isResetConfirmOpen]);
+
+  const handleResetClick = () => {
+    setIsResetConfirmOpen(true);
+  };
+
+  const handleResetPeq = async () => {
+    if (resetting) return;
+    setResetting(true);
+
+    for (const band of bandsOrder) {
+      const current = displayPeq[band];
+      // Skip only if already flat — nothing to change.
+      if (current.gain === 0 && current.filter_type === PEQFilter.Peak) continue;
+
+      await commitPEQ(band, 0, current.frequency, nearestQValue(3.0, PEAK_Q_VALUES), PEQFilter.Peak, current.bypass);
+    }
+
+    setResetting(false);
+  };
+
+  const confirmResetPeq = async () => {
+    setIsResetConfirmOpen(false);
+    await handleResetPeq();
+  };
+
+  const handleBypassClick = () => {
+    setPeqBypass(channel, !ActivePeq.bypass);
+  };
+
+  // Live handlers
+  const handleLiveHighPassValue = (value: number) => {
+    setLiveHpFreq(value);
+  };
+
+  const handleLiveLowPassValue = (value: number) => {
+    setLiveLpFreq(value);
+  };
+
+  const handleLivePEQValue = (band: PEQBand, value: PEQ) => {
+    setLivePeq((prev) => ({
+      ...prev,
+      [band]: value,
+    }));
+  };
+
+  // Real dsp value handlers
+  const commitHighPass = async (freq: number, filterType: CrossoverFilter) => {
+    const success = await setHighPass(channel, freq, filterType);
+    if (success) {
+      setLiveHpFreq(freq);
+    }
+    return success;
+  };
+
+  const commitLowPass = async (freq: number, filterType: CrossoverFilter) => {
+    const success = await setLowPass(channel, freq, filterType);
+    if (success) {
+      setLiveLpFreq(freq);
+    }
+    return success;
+  };
+
+  const commitPEQ = async (
+    band: PEQBand,
+    gain: number,
+    frequency: number,
+    q: number,
+    filter_type: PEQFilter,
+    bypass: boolean
+  ) => {
+    const success = await setPeq(channel, band, gain, frequency, q, filter_type, bypass);
+    if (success) {
+      setLivePeq((prev) => {
+        const next = { ...prev };
+        delete next[band];
+        return next;
+      });
+    }
+    return success;
+  };
+
+  // Diplay value (merge live and real)
+  const displayPeq: Record<PEQBand, PEQ> = {
+    ...ActivePeq.bands,
+    ...livePeq,
+  };
+
+  const highPassSpec = { frequency: liveHpFreq, filter_type: ActiveHighPassFilter.slope };
+  const lowPassSpec = { frequency: liveLpFreq, filter_type: ActiveLowPassFilter.slope };
+
+  const freqs = logSpace(GRAPH_X_MIN, GRAPH_X_MAX, 1000);
+
+  return (
+    <>
+      <div className="channel-graph-section">
+        <div className="channel-graph-panel">
+          <div className="channel-graph__title-row">
+            <div className="channel-graph__title">{activeChannelState.name} - Filters</div>
+            <GraphViewToggle view={graphView} onChange={setGraphView} />
+          </div>
+
+          {(graphView === 'both' || graphView === 'magnitude') && (
+            <div className="channel-graph-panel__magnitude-wrap">
+              <LinearGraph
+                ref={magnitudeGraphRef}
+                xMin={GRAPH_X_MIN}
+                xMax={GRAPH_X_MAX}
+                xScale="log"
+                yMin={GRAPH_Y_MIN}
+                yMax={GRAPH_Y_MAX}
+                yStep={3}
+                xLabel="Frequency - Hz"
+                yLabel="Magnituded - dB"
+                showGrid={true}
+                formatX={(v) => Math.round(v).toString()}
+                formatY={(v) => Math.round(v).toString()}
+                draw={({ ctx, toPx }) => {
+                  drawCurves({
+                    ctx,
+                    toPx,
+                    xMin: GRAPH_X_MIN,
+                    xMax: GRAPH_X_MAX,
+                    yMin: GRAPH_Y_MIN,
+                    yMax: GRAPH_Y_MAX,
+                    curves: [
+                      {
+                        points: sumCurvePoints([
+                          getPeqCurvePoints({ freqs, bands: displayPeq }),
+                          getCrossoverCurvePoints({
+                            freqs,
+                            highPass: highPassSpec,
+                            lowPass: lowPassSpec,
+                          }),
+                        ]),
+                        style: { strokeColor: '#e5e7eb', dimmed: ActivePeq.bypass },
+                      },
+                    ],
+                  });
+                }}
+              />
+            </div>
+          )}
+
+          {(graphView === 'both' || graphView === 'phase') && (
+            <LinearGraph
+              xMin={GRAPH_X_MIN}
+              xMax={GRAPH_X_MAX}
+              xScale="log"
+              yMin={-180}
+              yMax={180}
+              yStep={45}
+              xLabel="Frequency - Hz"
+              yLabel="Phase - Deg"
+              showGrid={true}
+              formatX={(v) => Math.round(v).toString()}
+              formatY={(v) => Math.round(v).toString()}
+              draw={({ ctx, toPx }) => {
+                drawCurves({
+                  ctx,
+                  toPx,
+                  xMin: GRAPH_X_MIN,
+                  xMax: GRAPH_X_MAX,
+                  yMin: GRAPH_Y_MIN,
+                  yMax: GRAPH_Y_MAX,
+                  curves: [
+                    {
+                      points: sumPhaseCurvePoints([
+                        getPeqPhasePoints({ freqs, bands: displayPeq }),
+                        getCrossoverPhasePoints({
+                          freqs,
+                          highPass: highPassSpec,
+                          lowPass: lowPassSpec,
+                        }),
+                      ]),
+                      style: { strokeColor: '#e5e7eb', dimmed: ActivePeq.bypass },
+                    },
+                  ],
+                });
+              }}
+            />
+          )}
+
+          {ActivePeq.bypass && (
+            <div className="channel-bypass-overlay">
+              <span>BYPASSED</span>
+            </div>
+          )}
+        </div>
+      </div>
+
+      <div className="channel-control-section">
+        <div className="channel-control-panel">
+          <ChannelGroup title="PEQ">
+            <PeqBandList
+              bands={ActivePeq.bands}
+              liveBands={livePeq}
+              activeBand={activeBand}
+              setActiveBand={setActiveBand}
+              setPEQ={commitPEQ}
+              bandsOrder={bandsOrder}
+            />
+            <PeqPanelSliders
+              peq={ActivePeq.bands[activeBand]}
+              setPEQ={(gain, frequency, q, filter_type, bypass) =>
+                commitPEQ(activeBand, gain, frequency, q, filter_type, bypass)
+              }
+              onLiveValue={(value) => handleLivePEQValue(activeBand, value)}
+            />
+          </ChannelGroup>
+
+          <ChannelGroup title="CrossOver">
+            <CrossoverPanel
+              crossover={ActiveHighPassFilter}
+              title="HighPass"
+              setCrossover={commitHighPass}
+              onLiveValue={handleLiveHighPassValue}
+            />
+            <CrossoverPanel
+              crossover={ActiveLowPassFilter}
+              title="LowPass"
+              setCrossover={commitLowPass}
+              onLiveValue={handleLiveLowPassValue}
+            />
+          </ChannelGroup>
+
+          <ChannelGroup title="Actions">
+            <ChannelActions
+              bypass={ActivePeq.bypass}
+              resetting={resetting}
+              onBypass={handleBypassClick}
+              onReset={handleResetClick}
+            />
+          </ChannelGroup>
+        </div>
+      </div>
+
+      {isResetConfirmOpen && (
+        <div className="confirm-modal-overlay" onClick={() => setIsResetConfirmOpen(false)}>
+          <div className="confirm-modal" onClick={(e) => e.stopPropagation()}>
+            <h3>Reset {activeChannelState.name} PEQ?</h3>
+            <p>
+              This will set all PEQ bands on {activeChannelState.name} back to flat (0 dB, Peak).
+              This action cannot be undone.
+            </p>
+
+            <div className="confirm-modal__actions">
+              <Button variant="outline" onClick={() => setIsResetConfirmOpen(false)}>
+                Cancel
+              </Button>
+              <Button variant="primary" onClick={confirmResetPeq}>
+                Reset
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+    </>
+  );
+}
+
+export default ChannelSection;

src/features/dsp408/components/CompressorSection/CompressorSection.css

@@ -18,17 +18,23 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .compressor-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .compressor-panel {
   position: relative;
+  height: 100%;
 
   aspect-ratio: 0.5;
   flex: 0 0 auto;
@@ -91,8 +97,9 @@
 
 .compressor-panel__cell--steppers {
   flex-direction: column;
-  justify-content: center;
+  justify-content: stretch;
   gap: 1cqh;
+  display: flex;
 }
 
 .compressor-panel__stepper-item {
@@ -108,6 +115,19 @@
   gap: 1cqh;
 }
 
+.compressor-panel__stepper-item .choice-stepper {
+  flex: 0 0 auto;
+  height: auto;
+}
+
+.compressor-panel__stepper {
+  display: flex;
+  font-size: 4cqh;
+  text-align: center;
+  align-items: stretch;
+  height: 100%;
+}
+
 .compressor-panel__cell {
   display: flex;
   flex-direction: column;
@@ -142,6 +162,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .compressor-graph-panel {
@@ -206,3 +229,15 @@
   flex: 1;
   min-height: 0;
 }
+
+.compressor-panel__stepper--centered .choice-stepper__input {
+  text-align: center;
+  padding: 0;
+  margin: 0;
+}
+
+.compressor-panel__stepper--centered .choice-stepper__arrows {
+  flex: 0 0 20%;
+  width: 20%;
+  padding-right: 0;
+}

src/features/dsp408/components/CompressorSection/CompressorSection.tsx

@@ -8,67 +8,7 @@ import MeterBar from '../../../../components/MeterBar/MeterBar';
 import { useMemo, useState } from 'react';
 import ChoiceStepper from '../../../../components/ChoiceStepper/ChoiceStepper';
 import './CompressorSection.css';
-
+import { RATIO_ORDER, RATIO_LABEL, RATIO_NUMERIC, KNEE_VALUES } from '../../constants';
-// Enum order defines stepper order (1:1 -> Limit).
-const RATIO_ORDER: Ratio[] = [
-  Ratio.Ratio1_1,
-  Ratio.Ratio1_1_1,
-  Ratio.Ratio1_1_3,
-  Ratio.Ratio1_1_5,
-  Ratio.Ratio1_1_7,
-  Ratio.Ratio1_2,
-  Ratio.Ratio1_2_5,
-  Ratio.Ratio1_3,
-  Ratio.Ratio1_3_5,
-  Ratio.Ratio1_4,
-  Ratio.Ratio1_5,
-  Ratio.Ratio1_6,
-  Ratio.Ratio1_8,
-  Ratio.Ratio1_10,
-  Ratio.Ratio1_20,
-  Ratio.Limit,
-];
-
-const RATIO_LABEL: Record<Ratio, string> = {
-  [Ratio.Ratio1_1]: '1:1',
-  [Ratio.Ratio1_1_1]: '1.1:1',
-  [Ratio.Ratio1_1_3]: '1.3:1',
-  [Ratio.Ratio1_1_5]: '1.5:1',
-  [Ratio.Ratio1_1_7]: '1.7:1',
-  [Ratio.Ratio1_2]: '2:1',
-  [Ratio.Ratio1_2_5]: '2.5:1',
-  [Ratio.Ratio1_3]: '3:1',
-  [Ratio.Ratio1_3_5]: '3.5:1',
-  [Ratio.Ratio1_4]: '4:1',
-  [Ratio.Ratio1_5]: '5:1',
-  [Ratio.Ratio1_6]: '6:1',
-  [Ratio.Ratio1_8]: '8:1',
-  [Ratio.Ratio1_10]: '10:1',
-  [Ratio.Ratio1_20]: '20:1',
-  [Ratio.Limit]: 'Limit',
-};
-
-// Numeric ratio used only for drawing the transfer curve; Limit ~= brickwall.
-const RATIO_NUMERIC: Record<Ratio, number> = {
-  [Ratio.Ratio1_1]: 1,
-  [Ratio.Ratio1_1_1]: 1.1,
-  [Ratio.Ratio1_1_3]: 1.3,
-  [Ratio.Ratio1_1_5]: 1.5,
-  [Ratio.Ratio1_1_7]: 1.7,
-  [Ratio.Ratio1_2]: 2,
-  [Ratio.Ratio1_2_5]: 2.5,
-  [Ratio.Ratio1_3]: 3,
-  [Ratio.Ratio1_3_5]: 3.5,
-  [Ratio.Ratio1_4]: 4,
-  [Ratio.Ratio1_5]: 5,
-  [Ratio.Ratio1_6]: 6,
-  [Ratio.Ratio1_8]: 8,
-  [Ratio.Ratio1_10]: 10,
-  [Ratio.Ratio1_20]: 20,
-  [Ratio.Limit]: 1000,
-};
-
-const KNEE_VALUES = Array.from({ length: 13 }, (_, i) => i); // 0..12 dB, integer steps
 
 const COMPRESSOR_SLIDER_PARAMS = [
   { key: 'threshold', label: 'Threshold', min: -90, max: 20, step: 0.5, unit: ' dB' },
@@ -76,19 +16,6 @@ const COMPRESSOR_SLIDER_PARAMS = [
   { key: 'release', label: 'Release', min: 10, max: 3000, step: 1, unit: ' ms' },
 ] as const;
 
-// ASSUMPTION: output meter indices follow the 4 input channels (0-3), i.e.
-// Out1 -> 4, Out2 -> 5, etc. Adjust to match dsp.meters.channels ordering.
-const OUTPUT_METER_INDEX: Record<OutputChannel, number> = {
-  [OutputChannel.Out1]: 4,
-  [OutputChannel.Out2]: 5,
-  [OutputChannel.Out3]: 6,
-  [OutputChannel.Out4]: 7,
-  [OutputChannel.Out5]: 8,
-  [OutputChannel.Out6]: 9,
-  [OutputChannel.Out7]: 10,
-  [OutputChannel.Out8]: 11,
-} as const;
-
 type CompressorParamKey = 'ratio' | 'attack' | 'release' | 'knee' | 'threshold';
 
 type CompressorValues = {
@@ -154,6 +81,7 @@ function CompressorPanel({
         <div className="compressor-panel__cell compressor-panel__cell--steppers">
           <div className="compressor-panel__stepper-item">
             <ChoiceStepper
+              className="compressor-panel__stepper compressor-panel__stepper--centered"
               value={comp.ratio}
               values={RATIO_ORDER}
               formatLabel={(v) => RATIO_LABEL[v]}
@@ -167,6 +95,7 @@ function CompressorPanel({
 
           <div className="compressor-panel__stepper-item">
             <ChoiceStepper
+              className="compressor-panel__stepper compressor-panel__stepper--centered"
               value={comp.knee}
               values={KNEE_VALUES}
               formatLabel={(v) => `${v} dB`}
@@ -284,7 +213,7 @@ function CompressorSection({ dsp, set_compressor }: { dsp: DSP; set_compressor:
     const steps = 120;
     const points: [number, number][] = [];
     for (let i = 0; i <= steps; i++) {
-      const x = -100 + (100 * i) / steps;
+      const x = -100 + (120 * i) / steps;
       points.push([x, compressorOutputDb(x, threshold, ratioNumeric, knee)]);
     }
     return points;
@@ -298,9 +227,9 @@ function CompressorSection({ dsp, set_compressor }: { dsp: DSP; set_compressor:
 
           <LinearGraph
             xMin={-100}
-            xMax={0}
+            xMax={20}
             yMin={-100}
-            yMax={0}
+            yMax={20}
             xLabel="in dB"
             yLabel="out dB"
             formatX={(v) => Math.round(v).toString()}
@@ -311,7 +240,7 @@ function CompressorSection({ dsp, set_compressor }: { dsp: DSP; set_compressor:
               ctx.lineWidth = 1;
               ctx.setLineDash([4, 4]);
               const [ux0, uy0] = toPx(-100, -100);
-              const [ux1, uy1] = toPx(0, 0);
+              const [ux1, uy1] = toPx(20, 20);
               ctx.beginPath();
               ctx.moveTo(ux0, uy0);
               ctx.lineTo(ux1, uy1);
@@ -323,7 +252,7 @@ function CompressorSection({ dsp, set_compressor }: { dsp: DSP; set_compressor:
               ctx.lineWidth = 1;
               ctx.setLineDash([2, 3]);
               const [tx0, ty0] = toPx(activeComp.threshold, -100);
-              const [tx1, ty1] = toPx(activeComp.threshold, 0);
+              const [tx1, ty1] = toPx(activeComp.threshold, 20);
               ctx.beginPath();
               ctx.moveTo(tx0, ty0);
               ctx.lineTo(tx1, ty1);
@@ -349,10 +278,13 @@ function CompressorSection({ dsp, set_compressor }: { dsp: DSP; set_compressor:
           <div className="compressor-graph__meters">
             {outputs.map((output) => {
               const outputState = dsp.state.current_config.output_states[output];
-              const idx = OUTPUT_METER_INDEX[output];
 
               return (
-                <MeterBar key={output} label={outputState.name} meter={dsp.meters.channels[idx]} />
+                <MeterBar
+                  key={output}
+                  label={outputState.name}
+                  meter={dsp.output_meters.meters[output]}
+                />
               );
             })}
           </div>

src/features/dsp408/components/ConnectionSection/ConnectionSection.css

@@ -5,6 +5,9 @@
   display: flex;
   justify-content: center;
   align-items: center;
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .connection-panel {

src/features/dsp408/components/ConnectionSection/ConnectionSection.tsx

@@ -1,4 +1,4 @@
-import { DSP } from '../../../../types';
+import { DSP, isConnected } from '../../../../types';
 import Button from '../../../../components/Button/Button';
 import Card from '../../../../components/Card/Card';
 import Led from '../../../../components/Led/Led';
@@ -14,12 +14,13 @@ function ConnectionPanel({
   onConnect: () => void;
   onDisconnect: () => void;
 }) {
-  const statusLabel =
+
-    dsp.status === 'connected'
+    const statusLabel =
-      ? 'Connected'
+      isConnected(dsp)
-      : dsp.status === 'connecting'
+        ? 'Connected'
-        ? 'Connecting…'
+        : dsp.isConnecting
-        : 'Disconnected';
+          ? 'Connecting…'
+          : 'Disconnected';
           
   return (
     <div className="connection-section">
@@ -35,10 +36,10 @@ function ConnectionPanel({
 
           <div className="connection-panel__status">
             <span className="connection-panel__led">
-              <Led status={dsp.status} />
+              <Led status={dsp.isConnecting ? "connecting" : isConnected(dsp) ? "connected" : "disconnected"} />
             </span>
 
-            <span className={`status-label status-label--${dsp.status}`}>{statusLabel}</span>
+            <span>{statusLabel}</span>
           </div>
         </div>
 
@@ -64,13 +65,13 @@ function ConnectionPanel({
         </dl>
 
         <div className="connection-panel__actions">
-          {dsp.status === 'connected' ? (
+          {isConnected(dsp) ? (
             <Button variant="outline" onClick={onDisconnect}>
               Disconnect
             </Button>
           ) : (
-            <Button variant="primary" onClick={onConnect} disabled={dsp.status === 'connecting'}>
+            <Button variant="primary" onClick={onConnect} disabled={dsp.isConnecting}>
-              {dsp.status === 'connecting' ? 'Connecting…' : 'Connect'}
+              {dsp.isConnecting ? 'Connecting…' : 'Connect'}
             </Button>
           )}
         </div>

src/features/dsp408/components/DSP408Panel/DSP408Panel.css

@@ -29,3 +29,9 @@
 .app-root:has(.sidebar-rail--expanded) .dsp-loading-overlay {
   left: var(--sidebar-width-expanded);
 }
+
+.app-root {
+  position: relative;
+  width: 100%;
+  height: 100%;
+}

src/features/dsp408/components/DSP408Panel/DSP408Panel.tsx

@@ -1,6 +1,17 @@
-import { useState } from 'react';
+import { useEffect, useState, type SetStateAction } from 'react';
 import { Sidebar, SidebarItem } from '../../../../components/Sidebar/Sidebar';
-import { InfoIcon, KnobGainIcon, TextIcon } from '../../../../assets/icons/AudioIcons';
+import {
+  BoltIcon,
+  CompressorIcon,
+  DelayIcon,
+  GainIcon,
+  GateIcon,
+  InfoIcon,
+  LimiterIcon,
+  MatrixIcon,
+  SlidersVerticalIcon,
+  TextIcon,
+} from '../../../../assets/icons/AudioIcons';
 import ConnectionPanel from '../ConnectionSection/ConnectionSection';
 import GainSection from '../GainSection/GainSection';
 import CompressorSection from '../CompressorSection/CompressorSection';
@@ -11,91 +22,78 @@ import LoadingOverlay from '../../../../components/LoadingOverlay/LoadingOverlay
 import { InputChannel, OutputChannel } from '../../types';
 import MatrixSection from '../Matrixsection/Matrixsection';
 import GeqSection from '../GeqSection/GeqSection';
-import InputSection from '../InputSection/InputSection';
+import ChannelSection from '../ChannelSection/ChannelSection';
 import { DSP408Api } from '../../dsp408';
 import { DSP408 } from '../../../../types';
 import { SidebarId } from '../../constants';
 import './DSP408Panel.css';
+import MiscellaneousPanel from '../MiscellaneousSection/MiscellaneousSection';
+import { PasswordDialog } from '../PasswordDialog/PasswordDialog';
+
+const activeSidebarByDsp = new Map<number, SidebarId>();
 
 function DSP408Panel({ dsp, api }: { dsp: DSP408; api: DSP408Api }) {
-  const [activeSidebar, setActiveSidebar] = useState<SidebarId>('overview');
   const [sidebarExpanded, setSidebarExpanded] = useState(false);
-  const [selectedPreset, setSelectedPreset] = useState(dsp.state?.presets.current_index ?? 0);
+  const [selectedPreset, setSelectedPreset] = useState(dsp.state.presets.current_index);
   const [presetLoading, setPresetLoading] = useState(false);
-  const inputStates = dsp.state?.current_config.input_states;
+
-  const outputStates = dsp.state?.current_config.output_states;
+  const inputStates = dsp.state.current_config.input_states;
+  const outputStates = dsp.state.current_config.output_states;
 
   const sidebarItems: SidebarItem<SidebarId>[] = [
     { id: 'overview', label: 'Overview', icon: <InfoIcon /> },
-    { id: 'gain', label: 'Gain', icon: <KnobGainIcon /> },
+    { id: 'gain', label: 'Gain', icon: <GainIcon /> },
-    { id: 'gate', label: 'Gate', icon: <KnobGainIcon /> },
+    { id: 'gate', label: 'Gate', icon: <GateIcon /> },
-    { id: 'compressor', label: 'Compressor', icon: <KnobGainIcon /> },
+    { id: 'compressor', label: 'Compressor', icon: <CompressorIcon /> },
-    { id: 'limiter', label: 'Limiter', icon: <KnobGainIcon /> },
+    { id: 'limiter', label: 'Limiter', icon: <LimiterIcon /> },
-    { id: 'delay', label: 'Delay', icon: <KnobGainIcon /> },
+    { id: 'delay', label: 'Delay', icon: <DelayIcon /> },
-    { id: 'matrix', label: 'Matrix', icon: <KnobGainIcon /> },
+    { id: 'matrix', label: 'Matrix', icon: <MatrixIcon /> },
-    { id: 'geq', label: 'Graphic Equalizer', icon: <KnobGainIcon /> },
+    { id: 'geq', label: 'Graphic Equalizer', icon: <SlidersVerticalIcon /> },
-    { id: 'ina', label: `${inputStates[InputChannel.InA].name}`, icon: <TextIcon>In A</TextIcon> },
+    { id: 'ina', label: inputStates[InputChannel.InA].name, icon: <TextIcon>In A</TextIcon>, editable: true },
-    { id: 'inb', label: `${inputStates[InputChannel.InB].name}`, icon: <TextIcon>In B</TextIcon> },
+    { id: 'inb', label: inputStates[InputChannel.InB].name, icon: <TextIcon>In B</TextIcon>, editable: true },
-    { id: 'inc', label: `${inputStates[InputChannel.InC].name}`, icon: <TextIcon>In C</TextIcon> },
+    { id: 'inc', label: inputStates[InputChannel.InC].name, icon: <TextIcon>In C</TextIcon>, editable: true },
-    { id: 'ind', label: `${inputStates[InputChannel.InD].name}`, icon: <TextIcon>In D</TextIcon> },
+    { id: 'ind', label: inputStates[InputChannel.InD].name, icon: <TextIcon>In D</TextIcon>, editable: true },
-    {
+    { id: 'out1', label: outputStates[OutputChannel.Out1].name, icon: <TextIcon>Out 1</TextIcon>, editable: true },
-      id: 'out1',
+    { id: 'out2', label: outputStates[OutputChannel.Out2].name, icon: <TextIcon>Out 2</TextIcon>, editable: true },
-      label: `${outputStates[OutputChannel.Out1].name}`,
+    { id: 'out3', label: outputStates[OutputChannel.Out3].name, icon: <TextIcon>Out 3</TextIcon>, editable: true },
-      icon: <TextIcon>Out 1</TextIcon>,
+    { id: 'out4', label: outputStates[OutputChannel.Out4].name, icon: <TextIcon>Out 4</TextIcon>, editable: true },
-    },
+    { id: 'out5', label: outputStates[OutputChannel.Out5].name, icon: <TextIcon>Out 5</TextIcon>, editable: true },
-    {
+    { id: 'out6', label: outputStates[OutputChannel.Out6].name, icon: <TextIcon>Out 6</TextIcon>, editable: true },
-      id: 'out2',
+    { id: 'out7', label: outputStates[OutputChannel.Out7].name, icon: <TextIcon>Out 7</TextIcon>, editable: true },
-      label: `${outputStates[OutputChannel.Out2].name}`,
+    { id: 'out8', label: outputStates[OutputChannel.Out8].name, icon: <TextIcon>Out 8</TextIcon>, editable: true },
-      icon: <TextIcon>Out 2</TextIcon>,
+    { id: 'miscellaneous', label: 'Miscellaneous', icon: <BoltIcon /> },
-    },
-    {
-      id: 'out3',
-      label: `${outputStates[OutputChannel.Out3].name}`,
-      icon: <TextIcon>Out 3</TextIcon>,
-    },
-    {
-      id: 'out4',
-      label: `${outputStates[OutputChannel.Out4].name}`,
-      icon: <TextIcon>Out 4</TextIcon>,
-    },
-    {
-      id: 'out5',
-      label: `${outputStates[OutputChannel.Out5].name}`,
-      icon: <TextIcon>Out 5</TextIcon>,
-    },
-    {
-      id: 'out6',
-      label: `${outputStates[OutputChannel.Out6].name}`,
-      icon: <TextIcon>Out 6</TextIcon>,
-    },
-    {
-      id: 'out7',
-      label: `${outputStates[OutputChannel.Out7].name}`,
-      icon: <TextIcon>Out 7</TextIcon>,
-    },
-    {
-      id: 'out8',
-      label: `${outputStates[OutputChannel.Out8].name}`,
-      icon: <TextIcon>Out 8</TextIcon>,
-    },
-    { id: 'miscellaneous', label: 'Miscellaneous', icon: <TextIcon>Out 1</TextIcon> },
   ];
 
-  const presets = dsp.state?.presets.names
+  const presets = [
-    ? [
+    { id: 'f00', name: 'Factory Preset' },
-        { id: 'f00', name: 'Factory Preset' },
+    ...(dsp.state.presets.names.map((name, index) => ({
-        ...dsp.state.presets.names.map((name, index) => ({
+      id: `u${String(index + 1).padStart(2, '0')}`,
-          id: `u${String(index + 1).padStart(2, '0')}`,
+      name,
-          name,
+    })) ??
-        })),
+      Array.from({ length: 20 }, (_, index) => ({
-      ]
+        id: `u${String(index + 1).padStart(2, '0')}`,
-    : [
+        name: 'Default Preset',
-        { id: 'f00', name: 'Factory Preset' },
+      }))),
-        ...Array.from({ length: 20 }, (_, index) => ({
+  ];
-          id: `u${String(index + 1).padStart(2, '0')}`,
+
-          name: 'Default Preset',
+  const [activeSidebar, setActiveSidebarState] = useState<SidebarId>(
-        })),
+    () => activeSidebarByDsp.get(dsp.id) ?? 'overview'
-      ];
+  );
+
+  useEffect(() => {
+    const saved = activeSidebarByDsp.get(dsp.id) ?? 'overview';
+    setActiveSidebarState(saved);
+  }, [dsp.id]);
+
+  const setActiveSidebar = (value: SetStateAction<SidebarId>) => {
+    setActiveSidebarState(prev => {
+      const next = typeof value === 'function' ? value(prev) : value;
+
+      activeSidebarByDsp.set(dsp.id, next);
+
+      return next;
+    });
+  };
 
   const onAppChange = async (id: string) => {
     const presetIndex = presets.findIndex((preset) => preset.id === id);
@@ -107,6 +105,43 @@ function DSP408Panel({ dsp, api }: { dsp: DSP408; api: DSP408Api }) {
     setPresetLoading(false);
   };
 
+  const onItemRename = async (id: SidebarId, name: string) => {
+    const channel = channelMap[id];
+    if (!channel) return;
+
+    const padded = name.slice(0, 8).padEnd(8, '\0');
+    await api.setChannelName(channel, padded);
+  };
+
+  const renderChannel = (channel: { Input: InputChannel } | { Output: OutputChannel }) => (
+    <ChannelSection
+      dsp={dsp}
+      channel={channel}
+      setLowPass={api.setLowPass}
+      setHighPass={api.setHighPass}
+      setPeq={api.setPeqBand}
+      setPeqBypass={api.setPEQBypass}
+    />
+  );
+
+  const channelMap: Partial<
+    Record<SidebarId, { Input: InputChannel } | { Output: OutputChannel }>
+  > = {
+    ina: { Input: InputChannel.InA },
+    inb: { Input: InputChannel.InB },
+    inc: { Input: InputChannel.InC },
+    ind: { Input: InputChannel.InD },
+
+    out1: { Output: OutputChannel.Out1 },
+    out2: { Output: OutputChannel.Out2 },
+    out3: { Output: OutputChannel.Out3 },
+    out4: { Output: OutputChannel.Out4 },
+    out5: { Output: OutputChannel.Out5 },
+    out6: { Output: OutputChannel.Out6 },
+    out7: { Output: OutputChannel.Out7 },
+    out8: { Output: OutputChannel.Out8 },
+  };
+
   const renderTab = () => {
     switch (activeSidebar) {
       case 'overview':
@@ -134,18 +169,6 @@ function DSP408Panel({ dsp, api }: { dsp: DSP408; api: DSP408Api }) {
       case 'delay':
         return <DelaySection dsp={dsp} setDelay={api.setDelay} setDelayUnit={api.setDelayUnit} />;
 
-      case 'ina':
-        return (
-          <InputSection
-            dsp={dsp}
-            channel={InputChannel.InA}
-            setLowPass={api.setLowPass}
-            setHighPass={api.setHighPass}
-            setPeq={api.setPeqBand}
-            setPeqBypass={api.setPEQBypass}
-          />
-        );
-
       case 'matrix':
         return (
           <MatrixSection
@@ -159,33 +182,58 @@ function DSP408Panel({ dsp, api }: { dsp: DSP408; api: DSP408Api }) {
       case 'geq':
         return <GeqSection dsp={dsp} setGeqBand={api.setGeqBand} setGeqBypass={api.setGeqBypass} />;
 
-      default:
+      case 'miscellaneous':
-        return null;
+        return (
+          <MiscellaneousPanel
+            dsp={dsp}
+            factoryReset={api.factoryReset}
+            copyChannel={api.copyChannel}
+            setInputSource={api.setInputSource}
+            linkChannels={api.linkChannels}
+            lockDevice={api.lockDevice}
+            setActiveSidebar={setActiveSidebar}
+          />
+        );
+
+      default: {
+        const channel = channelMap[activeSidebar];
+        return channel ? renderChannel(channel) : null;
+      }
     }
   };
 
   return (
     <div className={`app-root ${sidebarExpanded ? 'app-root--sidebar-expanded' : ''}`}>
-      <Sidebar
+        <Sidebar
-        items={sidebarItems}
+          items={sidebarItems}
-        activeId={activeSidebar}
+          activeId={activeSidebar}
-        onSelect={setActiveSidebar}
+          onSelect={setActiveSidebar}
-        appName={dsp.name}
+          appName={dsp.name}
-        appOptions={presets}
+          appOptions={presets}
-        selectedAppId={presets[selectedPreset]?.id}
+          selectedAppId={presets[selectedPreset]?.id}
-        onAppChange={onAppChange}
+          onAppChange={onAppChange}
-        onAppRename={api.setCurrentPresetName}
+          onAppRename={api.setCurrentPresetName}
-        expanded={sidebarExpanded}
+          onItemRename={onItemRename}
-        onToggle={() => setSidebarExpanded((v) => !v)}
+          expanded={sidebarExpanded}
-      />
+          onToggle={() => setSidebarExpanded((v) => !v)}
+        />
 
-      <LoadingOverlay
+        <LoadingOverlay
-        active={presetLoading}
+          active={presetLoading}
-        label="Recalling preset…"
+          label="Recalling preset…"
-        overlayClassName="dsp-loading-overlay"
+          overlayClassName="dsp-loading-overlay"
-      >
+        >
-        <div className="dsp-content">{renderTab()}</div>
+          <div className="dsp-content">{renderTab()}</div>
-      </LoadingOverlay>
+        </LoadingOverlay>
+
+
+      {dsp.passwordRequired && (
+        <PasswordDialog
+          name={dsp.name}
+          onSubmit={(pw: string) => api.connectWithPassword(pw)}
+          onCancel={() => api.cancelPassword()}
+        />
+      )}
     </div>
   );
 }

src/features/dsp408/components/DelaySection/DelaySection.css

@@ -19,13 +19,18 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .delay-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .delay-panel {
@@ -86,6 +91,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .delay-graph-panel {

src/features/dsp408/components/DelaySection/DelaySection.tsx

@@ -6,7 +6,7 @@ import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
 import { LinearGraph } from '../../../../components/LinearGraph/LinearGraph';
 import { useMemo, useState } from 'react';
 import './DelaySection.css';
-import { DELAY_RANGES } from '../../types';
+import { DELAY_RANGES } from '../../constants';
 
 const UNIT_LABEL: Record<DelayUnit, string> = {
   [DelayUnit.Millisecond]: 'ms',

src/features/dsp408/components/GainSection/GainSection.css

@@ -19,11 +19,14 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .gain-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
 }
@@ -74,6 +77,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .gain-graph-panel {
@@ -103,3 +109,121 @@
   flex: 1;
   min-height: 0;
 }
+
+.gain-graph-title-row {
+  flex: 0 0 auto;
+
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+
+  gap: 0.75cqh;
+  padding: 1cqh 1.5cqh;
+
+  min-width: 0;
+  overflow: hidden;
+}
+
+/* First row: title left, Show stages right */
+.gain-graph-title-line {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+
+  width: 100%;
+  min-width: 0;
+  gap: 1cqh;
+}
+
+.gain-graph-title-line .gain-graph-title {
+  flex: 1 1 auto;
+  min-width: 0;
+
+  padding: 0;
+
+  text-align: left;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+/* Compact button on the right */
+.gain-stages-toggle {
+  flex: 0 0 auto;
+
+  width: auto !important;
+  min-width: max-content;
+
+  padding: 0.4cqh 1cqh;
+  font-size: 1.8cqh;
+  line-height: 1.2;
+
+  white-space: nowrap;
+}
+
+/* Channel Selector */
+.magnitude-selector {
+  width: 100%;
+  min-width: 0;
+
+  display: flex;
+  align-items: center;
+  flex-wrap: nowrap;
+
+  gap: 0.5cqh;
+
+  overflow: hidden;
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.magnitude-selector__chip {
+  flex: 0 1 auto;
+  min-width: 0;
+
+  display: flex;
+  align-items: center;
+
+  gap: 0.6cqh;
+
+  font-family: var(--font-ui);
+  font-size: 1.8cqh;
+
+  padding: 0.4cqh 1cqh;
+
+  background: var(--bg-void);
+  color: var(--text-muted);
+
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+
+  cursor: pointer;
+  opacity: 0.5;
+
+  white-space: nowrap;
+  overflow: hidden;
+}
+
+.magnitude-selector__chip.active {
+  opacity: 1;
+  color: var(--text-primary);
+  border-color: var(--chip-color);
+}
+
+.magnitude-selector__swatch {
+  width: 1.2cqh;
+  height: 1.2cqh;
+
+  border-radius: 50%;
+  background: var(--chip-color);
+
+  flex: 0 0 auto;
+}
+
+.magnitude-selector__label {
+  min-width: 0;
+
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}

src/features/dsp408/components/GainSection/GainSection.tsx

@@ -1,12 +1,195 @@
 import VerticalSlider from '../../../../components/VerticalSlider/VerticalSlider';
-import { InputChannel, Channel, OutputChannel } from '../../types';
+import { InputChannel, Channel, OutputChannel, CrossoverFilter, PEQBand, PEQ } from '../../types';
 import { DSP408 as DSP } from '../../../../types';
 import Button from '../../../../components/Button/Button';
 import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
-import { LinearGraph } from '../../../../components/LinearGraph/LinearGraph';
 import './GainSection.css';
-import { DiscreteFrequency } from '../../types';
+import {
-import { DISCRETE_FREQUENCIES } from '../../constants';
+  GEQ_BANDS_LABEL,
+  GRAPH_X_MAX,
+  GRAPH_X_MIN,
+  GRAPH_Y_MAX,
+  GRAPH_Y_MIN,
+  INPUT_ORDER,
+  OUTPUT_ORDER,
+} from '../../constants';
+import { useState } from 'react';
+import LinearGraph from '../../../../components/LinearGraph/LinearGraph';
+import { drawCurves } from '../../utils/graph/draw';
+import { Curve, CurvePoint, sumCurvePoints } from '../../utils/graph/curve';
+import { getGeqCurvePoints } from '../../utils/graph/geq';
+import { getPeqCurvePoints } from '../../utils/graph/peq';
+import { getCrossoverCurvePoints } from '../../utils/graph/crossover';
+import { logSpace } from '../../utils/graph/curve';
+
+const CHANNEL_COLORS = [
+  '#4ade80',
+  '#60a5fa',
+  '#f472b6',
+  '#fbbf24',
+  '#a78bfa',
+  '#34d399',
+  '#f87171',
+  '#38bdf8',
+];
+
+const GEQ_CURVE_Q = 5;
+const Y_AXIS_STEP = 3; // must match the graph's yStep
+
+function buildColorMap<T extends string>(channels: T[]): Record<T, string> {
+  const map = {} as Record<T, string>;
+  channels.forEach((ch, i) => {
+    map[ch] = CHANNEL_COLORS[i % CHANNEL_COLORS.length];
+  });
+  return map;
+}
+
+// ---- Curve construction -----------------------------------------------
+
+type ChannelCurves = {
+  geq: CurvePoint[];
+  peqCrossover: CurvePoint[];
+  total: CurvePoint[];
+};
+
+function getGainCurvePoints(freqs: number[], gainDb: number): CurvePoint[] {
+  return freqs.map((x) => ({ x, y: gainDb }));
+}
+
+function getPeqCrossoverPoints(
+  freqs: number[],
+  peqChain: {
+    bypass: boolean;
+    bands: Record<PEQBand, PEQ>;
+  },
+  crossover: {
+    high_pass: { frequency: number; slope: CrossoverFilter };
+    low_pass: { frequency: number; slope: CrossoverFilter };
+  }
+) {
+  return sumCurvePoints([
+    ...(peqChain.bypass
+      ? []
+      : [
+          getPeqCurvePoints({
+            freqs,
+            bands: peqChain.bands,
+          }),
+        ]),
+    getCrossoverCurvePoints({
+      freqs,
+      highPass: {
+        frequency: crossover.high_pass.frequency,
+        filter_type: crossover.high_pass.slope,
+      },
+      lowPass: {
+        frequency: crossover.low_pass.frequency,
+        filter_type: crossover.low_pass.slope,
+      },
+    }),
+  ]);
+}
+
+function getInputChannelCurves(
+  state: DSP['state']['current_config']['input_states'][InputChannel],
+  freqs: number[],
+  liveGain: number | undefined
+): ChannelCurves {
+  const gain = liveGain ?? state.gain;
+
+  const geqValues = GEQ_BANDS_LABEL.map(({ frequency }) => state.geq.gains[frequency] ?? 0);
+
+  const geq = state.geq.bypass
+    ? []
+    : getGeqCurvePoints({
+        freqs,
+        values: geqValues,
+        q: GEQ_CURVE_Q,
+      });
+
+  const peqCrossover = getPeqCrossoverPoints(freqs, state.peq_chain, state.crossover);
+
+  const total = sumCurvePoints([geq, peqCrossover, getGainCurvePoints(freqs, gain)]);
+
+  return { geq, peqCrossover, total };
+}
+
+function getOutputChannelCurves(
+  state: DSP['state']['current_config']['output_states'][OutputChannel],
+  freqs: number[],
+  liveGain: number | undefined
+): ChannelCurves {
+  const gain = liveGain ?? state.gain;
+  const peqCrossover = getPeqCrossoverPoints(freqs, state.peq_chain, state.crossover);
+  const total = sumCurvePoints([peqCrossover, getGainCurvePoints(freqs, gain)]);
+
+  return { geq: [], peqCrossover, total };
+}
+
+// fill:false everywhere — with multiple overlapping curves the fill/fade
+// just muddies things; stroke-only makes each channel/stage legible.
+function buildCurvesForChannels<T extends string>(
+  channels: T[],
+  selected: Set<T>,
+  colors: Record<T, string>,
+  showStages: boolean,
+  getCurves: (channel: T) => ChannelCurves
+): Curve[] {
+  const curves: Curve[] = [];
+
+  [...channels].reverse().forEach((channel) => {
+    if (!selected.has(channel)) return;
+    const { geq, peqCrossover, total } = getCurves(channel);
+    const color = colors[channel];
+
+    if (showStages) {
+      if (geq.length > 0) {
+        curves.push({
+          points: geq,
+          style: { strokeColor: color, fill: false, dimmed: true, lineWidth: 1 },
+        });
+      }
+      if (peqCrossover.length > 0) {
+        curves.push({
+          points: peqCrossover,
+          style: { strokeColor: color, fill: false, dimmed: true, lineWidth: 1 },
+        });
+      }
+    }
+
+    curves.push({ points: total, style: { strokeColor: color, fill: false, lineWidth: 2 } });
+  });
+
+  return curves;
+}
+
+// Expands [baseMin, baseMax] outward to fit whatever the curves actually
+// contain (e.g. gain + geq + peq stacking past the nominal graph range),
+// snapped to the axis step with one step of headroom so nothing touches
+// the plot edge. Never shrinks below the base range.
+function computeYAxisBounds(
+  curves: Curve[],
+  baseMin: number,
+  baseMax: number,
+  step: number
+): { yMin: number; yMax: number } {
+  let dataMax = baseMax;
+  let dataMin = baseMin;
+
+  for (const curve of curves) {
+    for (const { y } of curve.points) {
+      if (y > dataMax) dataMax = y;
+      if (y < dataMin) dataMin = y;
+    }
+  }
+
+  const yMax = Math.ceil((dataMax + step) / step) * step;
+  const yMin = Math.floor((dataMin - step) / step) * step;
+
+  return { yMin, yMax };
+}
+
+// ---- Panels -------------------------------------------------------------
 
 function GainPanel({
   dsp,
@@ -15,6 +198,7 @@ function GainPanel({
   setGain,
   setMute,
   setInverse,
+  onLiveGain,
 }: {
   dsp: DSP;
   channel: Channel;
@@ -22,6 +206,7 @@ function GainPanel({
   setGain: (channel: Channel, gain: number) => Promise<boolean>;
   setMute: (channel: Channel, muted: boolean) => Promise<boolean>;
   setInverse: (channel: Channel, inverted: boolean) => Promise<boolean>;
+  onLiveGain: (value: number | null) => void;
 }) {
   const channelState =
     'Input' in channel
@@ -40,6 +225,18 @@ function GainPanel({
     await setInverse(channel, !inverted);
   };
 
+  const handleLiveValue = (value: number) => {
+    onLiveGain(value);
+  };
+
+  const commitGain = async (value: number) => {
+    const success = await setGain(channel, value);
+    if (success) {
+      onLiveGain(null);
+    }
+    return success;
+  };
+
   return (
     <div className="gain-panel">
       <div className="gain-panel__title">{title}</div>
@@ -51,7 +248,8 @@ function GainPanel({
         unit=" dB"
         value={gain}
         formatValue={(v, d) => (v > 0 ? `+${v.toFixed(d)}` : v.toFixed(d))}
-        onChange={(value) => setGain(channel, value)}
+        onInput={handleLiveValue}
+        onChange={commitGain}
       />
 
       <Button
@@ -90,6 +288,41 @@ function GainPanel({
   );
 }
 
+function ChannelSelector<T extends string>({
+  channels,
+  labels,
+  colors,
+  selected,
+  onToggle,
+}: {
+  channels: T[];
+  labels: Record<T, string>;
+  colors: Record<T, string>;
+  selected: Set<T>;
+  onToggle: (channel: T) => void;
+}) {
+  return (
+    <div className="magnitude-selector">
+      {channels.map((channel) => {
+        const isOn = selected.has(channel);
+        return (
+          <button
+            key={channel}
+            type="button"
+            className={`magnitude-selector__chip${isOn ? ' active' : ''}`}
+            style={{ '--chip-color': colors[channel] } as React.CSSProperties}
+            onClick={() => onToggle(channel)}
+            title={labels[channel]}
+          >
+            <span className="magnitude-selector__swatch" />
+            <span className="magnitude-selector__label">{labels[channel]}</span>
+          </button>
+        );
+      })}
+    </div>
+  );
+}
+
 function GainSection({
   dsp,
   setGain,
@@ -101,105 +334,218 @@ function GainSection({
   setMute: (channel: Channel, muted: boolean) => Promise<boolean>;
   setInverse: (channel: Channel, inverted: boolean) => Promise<boolean>;
 }) {
-  const inputs: InputChannel[] = [
+  const inputColors = buildColorMap(INPUT_ORDER);
-    InputChannel.InA,
+  const outputColors = buildColorMap(OUTPUT_ORDER);
-    InputChannel.InB,
-    InputChannel.InC,
-    InputChannel.InD,
-  ];
 
-  const outputs: { channel: Channel; title: string }[] = [
+  const [selectedInputs, setSelectedInputs] = useState<Set<InputChannel>>(new Set(INPUT_ORDER));
-    { channel: { Output: OutputChannel.Out1 }, title: 'Out 1' },
+  const [selectedOutputs, setSelectedOutputs] = useState<Set<OutputChannel>>(new Set(OUTPUT_ORDER));
-    { channel: { Output: OutputChannel.Out2 }, title: 'Out 2' },
-    { channel: { Output: OutputChannel.Out3 }, title: 'Out 3' },
-    { channel: { Output: OutputChannel.Out4 }, title: 'Out 4' },
-    { channel: { Output: OutputChannel.Out5 }, title: 'Out 5' },
-    { channel: { Output: OutputChannel.Out6 }, title: 'Out 6' },
-    { channel: { Output: OutputChannel.Out7 }, title: 'Out 7' },
-    { channel: { Output: OutputChannel.Out8 }, title: 'Out 8' },
-  ];
 
-  const currentChannel = dsp.state.current_config.input_states[InputChannel.InA];
+  const [showInputStages, setShowInputStages] = useState(false);
+  const [showOutputStages, setShowOutputStages] = useState(false);
+
+  const [liveInputGains, setLiveInputGains] = useState<Partial<Record<InputChannel, number>>>({});
+  const [liveOutputGains, setLiveOutputGains] = useState<Partial<Record<OutputChannel, number>>>(
+    {}
+  );
+
+  const setLiveInputGain = (channel: InputChannel, value: number | null) => {
+    setLiveInputGains((prev) => {
+      if (value === null) {
+        const next = { ...prev };
+        delete next[channel];
+        return next;
+      }
+      return { ...prev, [channel]: value };
+    });
+  };
+
+  const setLiveOutputGain = (channel: OutputChannel, value: number | null) => {
+    setLiveOutputGains((prev) => {
+      if (value === null) {
+        const next = { ...prev };
+        delete next[channel];
+        return next;
+      }
+      return { ...prev, [channel]: value };
+    });
+  };
+
+  const inputLabels: Record<InputChannel, string> = INPUT_ORDER.reduce(
+    (acc, channel) => ({
+      ...acc,
+      [channel]: dsp.state.current_config.input_states[channel].name,
+    }),
+    {} as Record<InputChannel, string>
+  );
+
+  const outputLabels: Record<OutputChannel, string> = OUTPUT_ORDER.reduce(
+    (acc, channel) => ({
+      ...acc,
+      [channel]: dsp.state.current_config.output_states[channel].name,
+    }),
+    {} as Record<OutputChannel, string>
+  );
+
+  const toggleInput = (channel: InputChannel) => {
+    setSelectedInputs((prev) => {
+      const next = new Set(prev);
+      next.has(channel) ? next.delete(channel) : next.add(channel);
+      return next;
+    });
+  };
+
+  const toggleOutput = (channel: OutputChannel) => {
+    setSelectedOutputs((prev) => {
+      const next = new Set(prev);
+      next.has(channel) ? next.delete(channel) : next.add(channel);
+      return next;
+    });
+  };
+
+  const freqs = logSpace(GRAPH_X_MIN, GRAPH_X_MAX, 1000);
+
+  const inputCurves = buildCurvesForChannels(
+    INPUT_ORDER,
+    selectedInputs,
+    inputColors,
+    showInputStages,
+    (channel) =>
+      getInputChannelCurves(
+        dsp.state.current_config.input_states[channel],
+        freqs,
+        liveInputGains[channel]
+      )
+  );
+
+  const outputCurves = buildCurvesForChannels(
+    OUTPUT_ORDER,
+    selectedOutputs,
+    outputColors,
+    showOutputStages,
+    (channel) =>
+      getOutputChannelCurves(
+        dsp.state.current_config.output_states[channel],
+        freqs,
+        liveOutputGains[channel]
+      )
+  );
+
+  const { yMin: inputYMin, yMax: inputYMax } = computeYAxisBounds(
+    inputCurves,
+    GRAPH_Y_MIN,
+    12,
+    Y_AXIS_STEP
+  );
+  const { yMin: outputYMin, yMax: outputYMax } = computeYAxisBounds(
+    outputCurves,
+    GRAPH_Y_MIN,
+    GRAPH_Y_MAX,
+    Y_AXIS_STEP
+  );
 
   return (
     <>
       <div className="gain-linear-graph-section">
         <div className="gain-graph-panel">
-          <div className="gain-graph-title">Frequency Response</div>
+          <div className="gain-graph-title-row">
+            <div className="gain-graph-title-line">
+              <div className="gain-graph-title">Input Response</div>
+              <Button
+                variant="toggle"
+                className={`gain-stages-toggle ${showInputStages ? 'active-info' : ''}`}
+                onClick={() => setShowInputStages((v) => !v)}
+              >
+                Show stages
+              </Button>
+            </div>
+            <ChannelSelector
+              channels={INPUT_ORDER}
+              labels={inputLabels}
+              colors={inputColors}
+              selected={selectedInputs}
+              onToggle={toggleInput}
+            />
+          </div>
           <LinearGraph
-            xMin={10}
+            xMin={GRAPH_X_MIN}
-            xMax={30000}
+            xMax={GRAPH_X_MAX}
             xScale="log"
-            yMin={-18}
+            yMin={inputYMin}
-            yMax={18}
+            yMax={inputYMax}
-            yStep={3}
+            yStep={Y_AXIS_STEP}
             xLabel="Hz"
             yLabel="dB"
+            showGrid={true}
+            formatX={(v) => Math.round(v).toString()}
+            formatY={(v) => {
+              // Always label 0.
+              if (v === 0) return '0';
+
+              // Positive side: label every 12 dB.
+              if (v > 0) {
+                return v % 12 === 0 ? `+${Math.round(v)}` : '';
+              }
+
+              // Negative side: label every 15 dB.
+              return Math.abs(v) % 15 === 0 ? Math.round(v).toString() : '';
+            }}
             draw={({ ctx, toPx }) => {
-              const geq = currentChannel.geq;
+              drawCurves({
-
+                ctx,
-              if (geq.bypass) {
+                toPx,
-                return;
+                xMin: GRAPH_X_MIN,
-              }
+                xMax: GRAPH_X_MAX,
-
+                yMin: inputYMin,
-              const points = Object.entries(geq.gains)
+                yMax: inputYMax,
-                .map(([frequency, gain]) => ({
+                curves: inputCurves,
-                  frequency: DISCRETE_FREQUENCIES[frequency as DiscreteFrequency],
+              });
-                  gain,
-                }))
-                .sort((a, b) => a.frequency - b.frequency)
-                .map(({ frequency, gain }) => {
-                  const [x, y] = toPx(frequency, gain);
-                  return { x, y };
-                });
-
-              if (points.length < 2) {
-                return;
-              }
-
-              ctx.strokeStyle = '#4ade80';
-              ctx.lineWidth = 2;
-              ctx.lineJoin = 'round';
-              ctx.lineCap = 'round';
-
-              ctx.beginPath();
-              ctx.moveTo(points[0].x, points[0].y);
-
-              for (let i = 1; i < points.length; i++) {
-                const previous = points[i - 1];
-                const current = points[i];
-
-                const midX = (previous.x + current.x) / 2;
-
-                ctx.quadraticCurveTo(previous.x, previous.y, midX, (previous.y + current.y) / 2);
-
-                ctx.quadraticCurveTo(current.x, current.y, current.x, current.y);
-              }
-
-              ctx.stroke();
             }}
           />
         </div>
 
         <div className="gain-graph-panel">
-          <div className="gain-graph-title">Phase Response</div>
+          <div className="gain-graph-title-row">
+            <div className="gain-graph-title-line">
+              <div className="gain-graph-title">Output Response</div>
+              <Button
+                variant={showOutputStages ? 'outline' : 'ghost'}
+                className="gain-stages-toggle"
+                onClick={() => setShowOutputStages((v) => !v)}
+              >
+                Show stages
+              </Button>
+            </div>
+
+            <ChannelSelector
+              channels={OUTPUT_ORDER}
+              labels={outputLabels}
+              colors={outputColors}
+              selected={selectedOutputs}
+              onToggle={toggleOutput}
+            />
+          </div>
           <LinearGraph
-            xMin={20}
+            xMin={GRAPH_X_MIN}
-            xMax={20000}
+            xMax={GRAPH_X_MAX}
-            yMin={-180}
+            xScale="log"
-            yMax={180}
+            yMin={outputYMin}
-            yStep={45}
+            yMax={outputYMax}
+            yStep={Y_AXIS_STEP}
             xLabel="Hz"
-            yLabel="deg"
+            yLabel="dB"
+            showGrid={true}
+            formatX={(v) => Math.round(v).toString()}
+            formatY={(v) => Math.round(v).toString()}
             draw={({ ctx, toPx }) => {
-              ctx.strokeStyle = '#4ade80';
+              drawCurves({
-              ctx.lineWidth = 2;
+                ctx,
-              const [x0, y0] = toPx(20, 0);
+                toPx,
-              const [x1, y1] = toPx(20000, 0);
+                xMin: GRAPH_X_MIN,
-              ctx.beginPath();
+                xMax: GRAPH_X_MAX,
-              ctx.moveTo(x0, y0);
+                yMin: outputYMin,
-              ctx.lineTo(x1, y1);
+                yMax: outputYMax,
-              ctx.stroke();
+                curves: outputCurves,
+              });
             }}
           />
         </div>
@@ -208,7 +554,7 @@ function GainSection({
       <div className="gain-section">
         <div className="gain-panels">
           <ChannelGroup title="Input">
-            {inputs.map((channel) => (
+            {INPUT_ORDER.map((channel) => (
               <GainPanel
                 key={channel}
                 dsp={dsp}
@@ -217,20 +563,22 @@ function GainSection({
                 setGain={setGain}
                 setMute={setMute}
                 setInverse={setInverse}
+                onLiveGain={(value) => setLiveInputGain(channel, value)}
               />
             ))}
           </ChannelGroup>
 
           <ChannelGroup title="Output">
-            {outputs.map(({ channel, title }) => (
+            {OUTPUT_ORDER.map((channel) => (
               <GainPanel
-                key={title}
+                key={channel}
                 dsp={dsp}
-                channel={channel}
+                channel={{ Output: channel }}
-                title={title}
+                title={dsp.state.current_config.output_states[channel].name}
                 setGain={setGain}
                 setMute={setMute}
                 setInverse={setInverse}
+                onLiveGain={(value) => setLiveOutputGain(channel, value)}
               />
             ))}
           </ChannelGroup>

src/features/dsp408/components/GateSection/GateSection.css

@@ -7,7 +7,7 @@
   right: 0;
   bottom: 0;
 
-  height: 40%;
+  height: var(--dsp-control-heigth);
 
   display: flex;
   align-items: flex-end;
@@ -20,13 +20,18 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .gate-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .gate-panel {
@@ -104,6 +109,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .gate-graph-panel {

src/features/dsp408/components/GateSection/GateSection.tsx

@@ -15,13 +15,6 @@ const GATE_PARAMS = [
   { key: 'release', label: 'Release', min: 10, max: 3000, step: 1, unit: ' ms' },
 ] as const;
 
-const INPUT_METER_INDEX: Record<InputChannel, number> = {
-  [InputChannel.InA]: 0,
-  [InputChannel.InB]: 1,
-  [InputChannel.InC]: 2,
-  [InputChannel.InD]: 3,
-} as const;
-
 type GateParamKey = (typeof GATE_PARAMS)[number]['key'];
 
 type GateValues = {
@@ -139,8 +132,8 @@ function GateSection({ dsp, set_gate }: { dsp: DSP; set_gate: SetGateFn }) {
           <LinearGraph
             xMin={envelope.t0}
             xMax={envelope.t5}
-            yMin={-90}
+            yMin={-95}
-            yMax={0}
+            yMax={5}
             xLabel="ms"
             yLabel="dB"
             formatX={(v) => Math.round(v).toString()}
@@ -185,9 +178,14 @@ function GateSection({ dsp, set_gate }: { dsp: DSP; set_gate: SetGateFn }) {
           <div className="gate-graph__meters">
             {inputs.map((input) => {
               const inputState = dsp.state.current_config.input_states[input];
-              const idx = INPUT_METER_INDEX[input];
+
-              const meter = dsp.meters.channels[idx];
+              return (
-              return <MeterBar key={input} label={inputState.name} meter={meter} />;
+                <MeterBar
+                  key={input}
+                  label={inputState.name}
+                  meter={dsp.input_meters.meters[input]}
+                />
+              );
             })}
           </div>
         </div>

src/features/dsp408/components/GeqSection/GeqSection.css

@@ -19,13 +19,18 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .geq-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .geq-band-panel {
@@ -112,6 +117,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .geq-graph-panel {

src/features/dsp408/components/GeqSection/GeqSection.tsx

@@ -4,21 +4,23 @@ import { DSP408 as DSP } from '../../../../types';
 import Button from '../../../../components/Button/Button';
 import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
 import { LinearGraph } from '../../../../components/LinearGraph/LinearGraph';
-import { GEQ_BAND_HZ, buildGeqCurveDraw } from '../../utils/geqCurve';
+import { drawCurves } from '../../utils/graph/draw';
 import {
   INPUT_ORDER,
   GRAPH_X_MIN,
   GRAPH_X_MAX,
   GRAPH_Y_MIN,
   GRAPH_Y_MAX,
-  GRAPH_GEQ_CURVE_Q,
   GEQ_GAIN_MIN,
   GEQ_GAIN_MAX,
   GEQ_GAIN_STEP,
   GEQ_BANDS_LABEL,
+  GEQ_CURVE_Q,
 } from '../../constants';
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import './GeqSection.css';
+import { getGeqCurvePoints } from '../../utils/graph/geq';
+import { logSpace } from '../../utils/graph/curve';
 
 type LiveBands = Partial<Record<DiscreteFrequency, number>>;
 
@@ -83,6 +85,7 @@ function GeqGraph({
   const values = GEQ_BANDS_LABEL.map(
     ({ frequency }) => liveBands?.[frequency] ?? geq.gains[frequency] ?? 0
   );
+  const freqs = logSpace(GRAPH_X_MIN, GRAPH_X_MAX, 1000);
 
   return (
     <div className="geq-graph-panel">
@@ -97,16 +100,23 @@ function GeqGraph({
         xLabel="Band Hz"
         yLabel="dB"
         showGrid={true}
-        draw={buildGeqCurveDraw({
+        draw={({ ctx, toPx }) => {
-          values,
+          drawCurves({
-          bandHz: GEQ_BAND_HZ,
+            ctx,
-          q: GRAPH_GEQ_CURVE_Q * 0.5,
+            toPx,
-          xMin: GRAPH_X_MIN,
+
-          xMax: GRAPH_X_MAX,
+            xMin: GRAPH_X_MIN,
-          yMin: GRAPH_Y_MIN,
+            xMax: GRAPH_X_MAX,
-          yMax: GRAPH_Y_MAX,
+            yMin: GRAPH_Y_MIN,
-          dimmed: geq.bypass,
+            yMax: GRAPH_Y_MAX,
-        })}
+            curves: [
+              {
+                points: getGeqCurvePoints({ freqs, values, q: GEQ_CURVE_Q }),
+                style: { strokeColor: '#e5e7eb', dimmed: geq.bypass },
+              },
+            ],
+          });
+        }}
       />
       {geq.bypass && (
         <div className="geq-bypass-overlay">
@@ -165,7 +175,7 @@ function GeqActions({
     <div className="geq-channel-selector">
       <Button
         variant="toggle"
-        className={bypass ? 'active-info' : ''}
+        className={bypass ? 'active-warning' : ''}
         onClick={onBypass}
         style={{
           width: '100%',
@@ -191,7 +201,7 @@ function GeqActions({
           minHeight: 0,
         }}
       >
-        {resetting ? 'Resetting…' : 'Reset'} {/* NEW */}
+        {resetting ? 'Resetting…' : 'Reset'}
       </Button>
     </div>
   );
@@ -208,7 +218,21 @@ function GeqSection({
 }) {
   const [activeChannel, setActiveChannel] = useState<InputChannel>(INPUT_ORDER[0]);
   const [liveGeq, setLiveGeq] = useState<Partial<Record<InputChannel, LiveBands>>>({});
-  const [resetting, setResetting] = useState(false); // NEW
+  const [resetting, setResetting] = useState(false);
+  const [isResetConfirmOpen, setIsResetConfirmOpen] = useState(false);
+
+  useEffect(() => {
+    if (!isResetConfirmOpen) return;
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        setIsResetConfirmOpen(false);
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [isResetConfirmOpen]);
 
   const handleLiveValue = (channel: InputChannel, band: DiscreteFrequency, value: number) => {
     setLiveGeq((prev) => ({
@@ -231,7 +255,15 @@ function GeqSection({
     return success;
   };
 
-  // NEW: sequential per-band reset, since hardware has no bulk reset command.
+  const handleBypassClick = () => {
+    setGeqBypass(activeChannel, !activeGeq.bypass);
+  };
+
+  const handleResetClick = () => {
+    setIsResetConfirmOpen(true);
+  };
+
+  // Sequential per-band reset, since hardware has no bulk reset command.
   const handleReset = async (channel: InputChannel) => {
     if (resetting) return;
     setResetting(true);
@@ -247,14 +279,15 @@ function GeqSection({
     setResetting(false);
   };
 
+  const confirmReset = async () => {
+    setIsResetConfirmOpen(false);
+    await handleReset(activeChannel);
+  };
+
   const activeInputState = dsp.state.current_config.input_states[activeChannel];
   const activeGeq = activeInputState.geq;
   const activeLiveBands = liveGeq[activeChannel];
 
-  const handleBypassClick = () => {
-    setGeqBypass(activeChannel, !activeGeq.bypass);
-  };
-
   const channelOptions = INPUT_ORDER.map((channel) => ({
     channel,
     label: dsp.state.current_config.input_states[channel].name,
@@ -296,12 +329,33 @@ function GeqSection({
                 bypass={activeGeq.bypass}
                 resetting={resetting}
                 onBypass={handleBypassClick}
-                onReset={() => handleReset(activeChannel)}
+                onReset={handleResetClick}
               />
             </ChannelGroup>
           </div>
         </div>
       </div>
+
+      {isResetConfirmOpen && (
+        <div className="confirm-modal-overlay" onClick={() => setIsResetConfirmOpen(false)}>
+          <div className="confirm-modal" onClick={(e) => e.stopPropagation()}>
+            <h3>Reset {activeInputState.name} GEQ?</h3>
+            <p>
+              This will set all GEQ bands on {activeInputState.name} back to 0 dB. This action
+              cannot be undone.
+            </p>
+
+            <div className="confirm-modal__actions">
+              <Button variant="outline" onClick={() => setIsResetConfirmOpen(false)}>
+                Cancel
+              </Button>
+              <Button variant="primary" onClick={confirmReset}>
+                Reset
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
     </>
   );
 }

src/features/dsp408/components/InputSection/InputSection.tsx

@@ -1,535 +0,0 @@
-// InputSection.tsx
-import VerticalSlider, {
-  makeLogStep,
-  makeLogQuantize,
-} from '../../../../components/VerticalSlider/VerticalSlider';
-// ASSUMPTION: an InputChannel enum exists alongside OutputChannel, mapping
-// input pages 1-8 similarly (In1 -> 0, In2 -> 1, ...). Adjust import/values
-// if the actual enum differs.
-import { InputChannel, Channel, PEQBand, PEQFilter, PEQ, Meter } from '../../types';
-import { DSP408 as DSP } from '../../../../types';
-import { CrossoverFilter } from '../../types';
-import { LinearGraph } from '../../../../components/LinearGraph/LinearGraph';
-import { useRef, useState } from 'react';
-import './InputSection.css';
-import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
-import Button from '../../../../components/Button/Button';
-import MeterBar from '../../../../components/MeterBar/MeterBar';
-
-const PEQ_BANDS: PEQBand[] = [
-  PEQBand.B1,
-  PEQBand.B2,
-  PEQBand.B3,
-  PEQBand.B4,
-  PEQBand.B5,
-  PEQBand.B6,
-  PEQBand.B7,
-  PEQBand.B8,
-];
-
-// ASSUMPTION: adjust these to match the real PEQFilter enum in ../../types
-const PEQ_FILTER_TYPE_OPTIONS: { value: PEQFilter; label: string }[] = [
-  { value: PEQFilter.Peak, label: 'Peak' },
-  { value: PEQFilter.LowShelf, label: 'Low Shelf' },
-  { value: PEQFilter.HighShelf, label: 'High Shelf' },
-];
-
-const FILTER_TYPE_OPTIONS: { value: CrossoverFilter; label: string }[] = [
-  { value: CrossoverFilter.Bw6, label: 'BW-6' },
-  { value: CrossoverFilter.Bw12, label: 'BW-12' },
-  { value: CrossoverFilter.Bw18, label: 'BW-18' },
-  { value: CrossoverFilter.Bw24, label: 'BW-24' },
-  { value: CrossoverFilter.Bw30, label: 'BW-30' },
-  { value: CrossoverFilter.Bw36, label: 'BW-36' },
-  { value: CrossoverFilter.Bw42, label: 'BW-42' },
-  { value: CrossoverFilter.Bw48, label: 'BW-48' },
-  { value: CrossoverFilter.Lk12, label: 'LR-12' },
-  { value: CrossoverFilter.Lk24, label: 'LR-24' },
-  { value: CrossoverFilter.Lk36, label: 'LR-36' },
-  { value: CrossoverFilter.Lk48, label: 'LR-48' },
-];
-
-const PEQ_SLIDER_PARAMS = [
-  { key: 'frequency', label: 'Frequency', min: 19.7, max: 20160, step: 0.5, unit: ' Hz' },
-  { key: 'q', label: 'Q', min: 1, max: 999, step: 1, unit: '' },
-  { key: 'gain', label: 'Gain', min: -12, max: +12, step: 0.1, unit: ' dB' },
-] as const;
-
-type SetPEQFn = (
-  channel: Channel,
-  band: PEQBand,
-  gainDb: number,
-  freqHz: number,
-  q: number,
-  filterType: PEQFilter,
-  bypass: boolean
-) => Promise<boolean>;
-
-type PeqParamKey = 'frequency' | 'q' | 'gain';
-
-type PEQValues = {
-  frequency: number;
-  q: number;
-  gain: number;
-  filter_type: PEQFilter;
-  bypass: boolean;
-};
-
-function PeqPanelSliders({
-  channel,
-  dsp,
-  band,
-  setPEQ,
-  // onLiveValue,
-}: {
-  channel: InputChannel;
-  dsp: DSP;
-  band: PEQBand;
-  setPEQ: SetPEQFn;
-  // onLiveValue: (channel: InputChannel, key: PeqParamKey, value: number) => void;
-}) {
-  const inputState = dsp.state.current_config.input_states[channel];
-  const peq = inputState.peq_chain.bands[band] as PEQ;
-
-  const commit = (overrides: Partial<PEQValues>) => {
-    const next = { ...peq, ...overrides };
-    return setPEQ(
-      { Input: channel },
-      band,
-      next.gain,
-      next.frequency,
-      next.q,
-      next.filter_type,
-      next.bypass
-    );
-  };
-
-  return (
-    <div className="input-panel">
-      <div className="input-panel__title">{'PEQ Parameters'}</div>
-
-      <div className="input-panel__grid">
-        {PEQ_SLIDER_PARAMS.map((param) => (
-          <div className={`input-panel__cell input-panel__cell--${param.key}`} key={param.key}>
-            <VerticalSlider
-              min={param.min}
-              max={param.max}
-              step={() => param.step}
-              unit={param.unit}
-              value={peq[param.key]}
-              // onInput={(value) => onLiveValue(channel, param.key, value)}
-              onChange={(value) => commit({ [param.key]: value } as Partial<PEQValues>)}
-              style={{ width: '100%', flex: '1 1 auto' }}
-            />
-            <div className="input-panel__cell-label">{param.label}</div>
-          </div>
-        ))}
-      </div>
-    </div>
-  );
-}
-
-const FREQ_MIN = 19.7;
-const FREQ_MAX = 20160;
-const FREQ_POINTS = 300;
-const FREQ_STEP = makeLogStep(FREQ_MIN, FREQ_MAX, FREQ_POINTS);
-const FREQ_QUANTIZE = makeLogQuantize(FREQ_MIN, FREQ_MAX, FREQ_POINTS);
-
-function CrossoverPanel({
-  channel,
-  dsp,
-  title,
-  setCrossover,
-}: {
-  channel: Channel;
-  dsp: DSP;
-  title: string;
-  setCrossover: (
-    channel: Channel,
-    frequency: number,
-    filter_type: CrossoverFilter
-  ) => Promise<boolean>;
-}) {
-  const channelState =
-    'Input' in channel
-      ? dsp.state?.current_config.input_states[channel.Input]
-      : dsp.state?.current_config.output_states[channel.Output];
-
-  const crossover = channelState?.crossover;
-
-  const frequency = crossover.high_pass.frequency;
-  const filter_type = crossover.high_pass.slope;
-  const bypass = false;
-
-  const commit = (overrides: {
-    frequency?: number;
-    filter_type?: CrossoverFilter;
-    bypass?: boolean;
-  }) => {
-    const next = { frequency, filter_type, bypass, ...overrides };
-    return setCrossover(channel, next.frequency, next.filter_type);
-  };
-
-  return (
-    <div className="crossover-panel">
-      <div className="crossover-panel__title">{title}</div>
-
-      <VerticalSlider
-        min={FREQ_MIN}
-        max={FREQ_MAX}
-        scale="log"
-        step={FREQ_STEP}
-        quantize={FREQ_QUANTIZE}
-        unit=" Hz"
-        value={frequency}
-        onChange={(value) => commit({ frequency: value })}
-        style={{ width: '100%', flex: '1 1 auto' }}
-      />
-
-      <select
-        className="crossover-panel__select"
-        value={filter_type}
-        onChange={(e) => commit({ filter_type: e.target.value as CrossoverFilter })}
-      >
-        {FILTER_TYPE_OPTIONS.map((opt) => (
-          <option key={opt.value} value={opt.value}>
-            {opt.label}
-          </option>
-        ))}
-      </select>
-
-      <Button
-        variant="toggle"
-        className={bypass ? 'active-warning' : ''}
-        onClick={() => commit({ bypass: !bypass })}
-        style={{
-          width: '85%',
-          paddingLeft: 0,
-          paddingRight: 0,
-          fontSize: '4cqh',
-          paddingTop: '2cqh',
-          paddingBottom: '2cqh',
-          minHeight: 0,
-        }}
-      >
-        {bypass ? 'Bypassed' : 'Bypass'}
-      </Button>
-    </div>
-  );
-}
-
-function PeqBandList({
-  channel,
-  dsp,
-  activeBand,
-  setActiveBand,
-  setPEQ,
-}: {
-  channel: InputChannel;
-  dsp: DSP;
-  activeBand: PEQBand;
-  setActiveBand: (band: PEQBand) => void;
-  setPEQ: SetPEQFn;
-}) {
-  const inputState = dsp.state.current_config.input_states[channel];
-
-  const commit = (band: PEQBand, overrides: Partial<PEQValues>) => {
-    const peq = inputState.peq_chain.bands[band] as PEQ;
-    const next = { ...peq, ...overrides };
-    return setPEQ(
-      { Input: channel },
-      band,
-      next.gain,
-      next.frequency,
-      next.q,
-      next.filter_type,
-      next.bypass
-    );
-  };
-
-  return (
-    <div className="peq-band-list">
-      <div className="peq-band-list__row peq-band-list__row--header">
-        <div className="peq-band-list__cell">Band</div>
-        <div className="peq-band-list__cell">Freq</div>
-        <div className="peq-band-list__cell">Q</div>
-        <div className="peq-band-list__cell">Gain</div>
-        <div className="peq-band-list__cell">Type</div>
-        <div className="peq-band-list__cell">Bypass</div>
-      </div>
-
-      {PEQ_BANDS.map((band, i) => {
-        const peq = inputState.peq_chain.bands[band] as PEQ;
-        const isActive = band === activeBand;
-
-        return (
-          <div
-            className={`peq-band-list__row${isActive ? ' peq-band-list__row--active' : ''}`}
-            key={band}
-          >
-            <Button
-              variant="toggle"
-              className={isActive ? 'active' : ''}
-              onClick={() => setActiveBand(band)}
-              style={{ minHeight: 0 }}
-            >
-              {`B${i + 1}`}
-            </Button>
-
-            <input
-              className="peq-band-list__input"
-              type="number"
-              step={0.5}
-              min={19.7}
-              max={20160}
-              value={peq.frequency}
-              onChange={(e) => commit(band, { frequency: Number(e.target.value) })}
-            />
-
-            <input
-              className="peq-band-list__input"
-              type="number"
-              step={1}
-              min={1}
-              max={999}
-              value={peq.q}
-              onChange={(e) => commit(band, { q: Number(e.target.value) })}
-            />
-
-            <input
-              className="peq-band-list__input"
-              type="number"
-              step={0.1}
-              min={-12}
-              max={12}
-              value={peq.gain}
-              onChange={(e) => commit(band, { gain: Number(e.target.value) })}
-            />
-
-            <select
-              className="peq-band-list__select"
-              value={peq.filter_type}
-              onChange={(e) => commit(band, { filter_type: e.target.value as PEQFilter })}
-            >
-              {PEQ_FILTER_TYPE_OPTIONS.map((opt) => (
-                <option key={opt.value} value={opt.value}>
-                  {opt.label}
-                </option>
-              ))}
-            </select>
-
-            <Button
-              variant="toggle"
-              className={peq.bypass ? 'active-warning' : ''}
-              onClick={() => commit(band, { bypass: !peq.bypass })}
-              style={{ minHeight: 0 }}
-            >
-              {peq.bypass ? 'Bypassed' : 'Bypass'}
-            </Button>
-          </div>
-        );
-      })}
-    </div>
-  );
-}
-
-type SetFilterFn = (
-  channel: Channel,
-  freq: number,
-  filterType: CrossoverFilter
-) => Promise<boolean>;
-
-type setPeqBandFn = (
-  channel: Channel,
-  band: PEQBand,
-  gainDb: number,
-  freqHz: number,
-  q: number,
-  filterType: PEQFilter,
-  bypass: boolean
-) => Promise<boolean>;
-
-function InputSection({
-  dsp,
-  channel,
-  setHighPass,
-  setLowPass,
-  setPeq,
-  setPeqBypass,
-}: {
-  dsp: DSP;
-  channel: InputChannel;
-  setHighPass: SetFilterFn;
-  setLowPass: SetFilterFn;
-  setPeq: setPeqBandFn;
-  setPeqBypass: (channel: Channel, bypass: boolean) => Promise<boolean>;
-}) {
-  const [activeBand, setActiveBand] = useState<PEQBand>(PEQBand.B1);
-
-  const [liveHpFreq, setLiveHpFreq] = useState<number>(19.7);
-  const [liveLpFreq, setLiveLpFreq] = useState<number>(20.16);
-  const [livePeq, setLivePeq] = useState<Partial<Record<PEQBand, PEQValues>>>({});
-
-  const inputState = dsp.state.current_config.input_states[channel];
-
-  const hp = inputState.crossover.high_pass;
-  const lp = inputState.crossover.low_pass;
-  const activePeq = livePeq[activeBand] ?? (inputState.peq_chain.bands[activeBand] as PEQValues);
-
-  const bypassed = hp.slope === CrossoverFilter.Bypass;
-  const activeFilterType = bypassed && lp.slope !== CrossoverFilter.Bypass ? lp.slope : hp.slope;
-
-  // Remembers the last non-bypass slope so the Bypass button can restore it.
-  // const lastNonBypassType = useRef<CrossoverFilter>(
-  //   activeFilterType === CrossoverFilter.Bypass ? DEFAULT_FILTER_TYPE : activeFilterType
-  // );
-  // if (activeFilterType !== CrossoverFilter.Bypass) {
-  //   lastNonBypassType.current = activeFilterType;
-  // }
-
-  const hpFreq = liveHpFreq ?? hp.frequency;
-  const lpFreq = liveLpFreq ?? lp.frequency;
-
-  // const commitHighPass = async (freq: number, filterType: CrossoverFilter) => {
-  //   const success = await set_high_pass({ Input: channel }, freq, filterType);
-  //   if (success) setLiveHpFreq(null);
-  //   return success;
-  // };
-
-  // const commitLowPass = async (freq: number, filterType: CrossoverFilter) => {
-  //   const success = await set_low_pass({ Input: channel }, freq, filterType);
-  //   if (success) setLiveLpFreq(null);
-  //   return success;
-  // };
-
-  // const handleFilterTypeChange = (filterType: CrossoverFilter) => {
-  //   // Applying a slope change always takes the crossover out of bypass.
-  //   void commitHighPass(hpFreq, filterType);
-  //   void commitLowPass(lpFreq, filterType);
-  // };
-
-  // const handleBypassToggle = () => {
-  //   if (bypassed) {
-  //     const restore = lastNonBypassType.current;
-  //     void commitHighPass(hpFreq, restore);
-  //     void commitLowPass(lpFreq, restore);
-  //   } else {
-  //     void commitHighPass(hpFreq, CrossoverFilter.Bypass);
-  //     void commitLowPass(lpFreq, CrossoverFilter.Bypass);
-  //   }
-  // };
-
-  return (
-    <>
-      <div className="input-graph-section">
-        <div className="input-graph-panel">
-          <div className="input-graph__title">{inputState.name} - Filters</div>
-
-          {/* TODO: draw HP/LP transfer curves here once filter math is defined,
-              same pattern as LimiterSection's `draw` prop. */}
-          <LinearGraph
-            xMin={20}
-            xMax={20000}
-            yMin={-30}
-            yMax={6}
-            xLabel="Hz"
-            yLabel="dB"
-            formatX={(v) => Math.round(v).toString()}
-            formatY={(v) => Math.round(v).toString()}
-            draw={() => {}}
-          />
-        </div>
-      </div>
-
-      <div className="input-control-section">
-        <div className="input-control-panel">
-          <ChannelGroup title="PEQ">
-            <PeqBandList
-              channel={channel}
-              dsp={dsp}
-              activeBand={activeBand}
-              setActiveBand={setActiveBand}
-              setPEQ={setPeq}
-            />
-            <PeqPanelSliders channel={channel} dsp={dsp} band={activeBand} setPEQ={setPeq} />
-          </ChannelGroup>
-
-          <ChannelGroup title="CrossOver">
-            <CrossoverPanel
-              channel={{ Input: channel }}
-              dsp={dsp}
-              title="LowPass"
-              setCrossover={setHighPass}
-            />
-            <CrossoverPanel
-              channel={{ Input: channel }}
-              dsp={dsp}
-              title="HighPass"
-              setCrossover={setHighPass}
-            />
-          </ChannelGroup>
-          {/* <div className="input-control-panel__sliders">
-            <div className="input-control-panel__cell input-control-panel__cell--high-pass">
-              <VerticalSlider
-                min={FREQ_MIN}
-                max={FREQ_MAX}
-                step={FREQ_STEP}
-                unit=" Hz"
-                value={hpFreq}
-                // disabled={bypassed}
-                onInput={(value) => setLiveHpFreq(value)}
-                onChange={(value) => commitHighPass(value, activeFilterType)}
-                style={{ width: '100%', flex: '1 1 auto' }}
-              />
-              <div className="input-control-panel__cell-label">High Pass</div>
-            </div>
-
-            <div className="input-control-panel__cell input-control-panel__cell--low-pass">
-              <VerticalSlider
-                min={FREQ_MIN}
-                max={FREQ_MAX}
-                step={FREQ_STEP}
-                unit=" Hz"
-                value={lpFreq}
-                // disabled={bypassed}
-                onInput={(value) => setLiveLpFreq(value)}
-                onChange={(value) => commitLowPass(value, activeFilterType)}
-                style={{ width: '100%', flex: '1 1 auto' }}
-              />
-              <div className="input-control-panel__cell-label">Low Pass</div>
-            </div>
-          </div>
-
-          <div className="input-control-panel__side">
-            <label className="input-control-panel__select">
-              <span className="input-control-panel__select-label">Filter Type</span>
-              <select
-                value={activeFilterType}
-                disabled={bypassed}
-                onChange={(e) => handleFilterTypeChange(e.target.value as CrossoverFilter)}
-              >
-                {FILTER_TYPE_OPTIONS.map((opt) => (
-                  <option key={opt.value} value={opt.value}>
-                    {opt.label}
-                  </option>
-                ))}
-              </select>
-            </label>
-
-            <button
-              type="button"
-              className={`input-control-panel__bypass-btn${
-                bypassed ? ' input-control-panel__bypass-btn--active' : ''
-              }`}
-              onClick={handleBypassToggle}
-            >
-              {bypassed ? 'Bypassed' : 'Bypass'}
-            </button>
-          </div> */}
-        </div>
-      </div>
-    </>
-  );
-}
-
-export default InputSection;

src/features/dsp408/components/LimiterSection/LimiterSection.css

@@ -18,18 +18,23 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .limiter-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .limiter-panel {
   position: relative;
-  height: 10;
+  height: 100%;
 
   aspect-ratio: 0.5;
   flex: 0 0 auto;
@@ -116,6 +121,9 @@
 
   box-sizing: border-box;
   background: var(--bg-panel);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .limiter-graph-panel {

src/features/dsp408/components/LimiterSection/LimiterSection.tsx

@@ -14,20 +14,6 @@ const LIMITER_SLIDER_PARAMS = [
   { key: 'release', label: 'Release', min: 10, max: 3000, step: 1, unit: ' ms' },
 ] as const;
 
-// ASSUMPTION: output meter indices follow the 4 input channels (0-3), i.e.
-// Out1 -> 4, Out2 -> 5, etc. Same mapping as CompressorSection — adjust if
-// dsp.meters.channels ordering differs.
-const OUTPUT_METER_INDEX: Record<OutputChannel, number> = {
-  [OutputChannel.Out1]: 4,
-  [OutputChannel.Out2]: 5,
-  [OutputChannel.Out3]: 6,
-  [OutputChannel.Out4]: 7,
-  [OutputChannel.Out5]: 8,
-  [OutputChannel.Out6]: 9,
-  [OutputChannel.Out7]: 10,
-  [OutputChannel.Out8]: 11,
-} as const;
-
 type LimiterParamKey = 'threshold' | 'attack' | 'release';
 
 type LimiterValues = {
@@ -206,10 +192,13 @@ function LimiterSection({ dsp, set_limiter }: { dsp: DSP; set_limiter: SetLimite
           <div className="limiter-graph__meters">
             {outputs.map((output) => {
               const outputState = dsp.state.current_config.output_states[output];
-              const idx = OUTPUT_METER_INDEX[output];
 
               return (
-                <MeterBar key={output} label={outputState.name} meter={dsp.meters.channels[idx]} />
+                <MeterBar
+                  key={output}
+                  label={outputState.name}
+                  meter={dsp.output_meters.meters[output]}
+                />
               );
             })}
           </div>

src/features/dsp408/components/Matrixsection/Matrixsection.css

@@ -19,19 +19,25 @@
   z-index: 20;
 
   border-top: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
 }
 
 .matrix-panels {
+  display: grid;
+  grid-auto-flow: column;
   height: 100%;
-  display: flex;
   gap: var(--space-2);
   overflow-x: auto;
+  justify-content: center;
 }
 
 .matrix-panel {
   position: relative;
+  height: 100%;
 
-  aspect-ratio: 0.6;
+  aspect-ratio: 0.5;
   flex: 0 0 auto;
 
   display: flex;
@@ -84,10 +90,30 @@
   padding-inline: 3cqh;
 }
 
+.matrix-panel__row .choice-stepper {
+  align-self: center;
+  aspect-ratio: 3 / 1;
+  flex: 0 0 auto;
+}
+
 .matrix-flow {
   flex: 0 0 calc(100% - var(--dsp-control-heigth));
   min-height: 0;
   box-sizing: border-box;
   padding: var(--space-2);
   border-bottom: var(--border-width) solid var(--border-hairline);
+
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.matrix-gain-stepper .choice-stepper__input {
+  font-size: 2.8cqh;
+  text-align: center;
+}
+
+.matrix-gain-stepper .choice-stepper__arrows {
+  flex: 0 0 20%;
+  width: 20%;
+  padding-right: 0;
 }