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 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

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 2.0.20",
+ "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"
@@ -796,12 +853,13 @@ dependencies = [
 name = "dsp_thomann"
 version = "0.1.0"
 dependencies = [
+ "rand",
  "serde",
  "serde_json",
  "serde_with",
  "strum",
  "strum_macros",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
 ]
 
 [[package]]
@@ -1255,6 +1313,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "r-efi 6.0.0",
+ "rand_core",
 ]
 
 [[package]]
@@ -1762,6 +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"
@@ -2005,7 +2118,7 @@ dependencies = [
  "once_cell",
  "png 0.18.1",
  "serde",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "windows-sys 0.61.2",
 ]
 
@@ -2493,6 +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"
@@ -2606,6 +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"
@@ -2629,7 +2774,7 @@ checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
 dependencies = [
  "getrandom 0.2.17",
  "libredox",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
 ]
 
 [[package]]
@@ -2649,7 +2794,7 @@ checksum = "2c9283685feec7d69af75fb0e858d5e7378f33fe4fc699383b2916ab9273e03c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2883,7 +3028,7 @@ checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2918,7 +3063,7 @@ checksum = "8d3b1629de253c70a0508c3899572da79ca359fdab27c7920ff00406df418906"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2941,16 +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",
@@ -2961,14 +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]]
@@ -3009,7 +3155,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
  "digest",
 ]
 
@@ -3199,9 +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",
@@ -3300,9 +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",
@@ -3339,7 +3485,7 @@ dependencies = [
  "tauri-runtime",
  "tauri-runtime-wry",
  "tauri-utils",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "tokio",
  "tray-icon",
  "url",
@@ -3390,7 +3536,7 @@ dependencies = [
  "sha2",
  "syn 2.0.119",
  "tauri-utils",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "time",
  "url",
  "uuid",
@@ -3429,9 +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",
@@ -3443,7 +3589,7 @@ dependencies = [
  "serde_json",
  "tauri",
  "tauri-plugin",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "url",
  "windows",
  "zbus",
@@ -3467,7 +3613,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tauri-utils",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "url",
  "webkit2gtk",
  "webview2-com",
@@ -3530,7 +3676,7 @@ dependencies = [
  "serde_json",
  "serde_with",
  "swift-rs",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "toml 1.1.3+spec-1.1.0",
  "url",
  "urlpattern",
@@ -3582,11 +3728,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.20"
+version = "2.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec86235f5fcc2a73650310756d2ac5b138a5780bbbdfae3eeccec992c435ba4f"
+checksum = "09e52cb86a36cede5cb101bf8908837b3e4c6e5e59fe7fd85c23fb56200d189e"
 dependencies = [
- "thiserror-impl 2.0.20",
+ "thiserror-impl 2.0.21",
 ]
 
 [[package]]
@@ -3602,13 +3748,13 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.20"
+version = "2.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc04cd3e1236dd4a98afca4569f2deb3f120e5422a4023be2cb683f8486292af"
+checksum = "fe5197923287db20a58125f0bc85c062f7f2c892de97b18c356f9efb14b28524"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.2",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -3919,7 +4065,7 @@ dependencies = [
  "once_cell",
  "png 0.18.1",
  "serde",
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "windows-sys 0.61.2",
 ]
 
@@ -4279,7 +4425,7 @@ version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "381336cfffd772377d291702245447a5251a2ffa5bad679c99e61bc48bacbf9c"
 dependencies = [
- "thiserror 2.0.20",
+ "thiserror 2.0.21",
  "windows",
  "windows-core 0.61.2",
 ]
@@ -4714,7 +4860,7 @@ dependencies = [
  "sha2",
  "soup3",
  "tao-macros",
- "thiserror 2.0.20",
+ "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"] }

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

@@ -46,7 +46,6 @@ pub struct DSP408Snapshot {
     pub state: types::DSPState,
     pub input_meters: types::InputMeters,
     pub output_meters: types::OutputMeters,
-    pub mode: types::DSPMode,
 }
 
 #[tauri::command]
@@ -104,7 +103,6 @@ pub async fn get_dsp_snapshot(
             state: device.dsp.state().clone(),
             input_meters: device.dsp.input_meters().clone(),
             output_meters: device.dsp.output_meters().clone(),
-            mode: device.dsp.mode(),
         })
     })
 }
@@ -180,7 +178,7 @@ pub async fn store_current_configuration(
     })
 }
 
-// Command `0x23` -- TODO
+// Command `0x23`
 #[tauri::command]
 pub async fn factory_reset(
     state: State<'_, AppState>,
@@ -207,7 +205,7 @@ pub async fn set_current_preset_name(
     })
 }
 
-// Command `0x2A` -- TODO
+// Command `0x2A`
 #[tauri::command]
 pub async fn copy_channel(
     state: State<'_, AppState>,
@@ -224,7 +222,34 @@ pub async fn copy_channel(
 }
 
 // Command `0x2D` -- TODO
-// Command `0x2F` -- 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]
@@ -372,7 +397,7 @@ pub async fn set_delay(
     })
 }
 
-// Command `0x39` -- TODO
+// Command `0x39`
 #[tauri::command]
 pub async fn set_input_source(
     state: State<'_, AppState>,
@@ -403,7 +428,7 @@ pub async fn set_matrix_routing(
     })
 }
 
-// Command `0x3B` -- TODO
+// Command `0x3B`
 #[tauri::command]
 pub async fn link_channels(
     state: State<'_, AppState>,

src-tauri/src/lib.rs

@@ -21,6 +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

@@ -12,7 +12,7 @@
   "app": {
     "windows": [
       {
-        "title": "thomann-dsp-app",
+        "title": "Thomann DSP Controller",
         "width": 1600,
         "height": 950,
         "minWidth": 1200,
@@ -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/components/ChoiceSelect/ChoiceSelect.css

@@ -1,65 +1,125 @@
+/* ChoiceSelect.css */
 .choice-select {
   position: relative;
   display: flex;
-  align-items: stretch;
+
+  color: var(--accent-brand);
 }
 
 .choice-select[data-disabled] {
   opacity: 0.5;
 }
 
-.choice-select__input {
+.choice-select__trigger {
   flex: 1 1 auto;
+  width: 100%;
+  height: 100%;
 
-  height: var(--card-control-height);
+  display: flex;
-  padding: 0 var(--space-6) 0 var(--space-3);
+  align-items: center;
+  justify-content: space-between;
+
+  padding: 0;
+  padding-inline: 5%;
 
   background: transparent;
-  color: var(--text-primary);
   border: var(--border-width) solid var(--border-hairline);
   border-radius: var(--radius-sm);
 
   font-family: var(--font-ui);
-  font-size: var(--font-sm);
+  font-size: 90%;
 
-  appearance: none;
+  color: inherit;
-  -webkit-appearance: none;
-  -moz-appearance: none;
 
-  outline: none;
   cursor: pointer;
-
   transition: border-color var(--dur-base) var(--ease-standard);
 }
 
-.choice-select__input:focus {
+.choice-select__trigger:hover,
+.choice-select__trigger--open {
   border-color: var(--accent-brand);
 }
 
-.choice-select__input:disabled {
+.choice-select__trigger:disabled {
   cursor: not-allowed;
 }
 
+.choice-select__label {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .choice-select__chevron {
-  position: absolute;
+  flex-shrink: 0;
-  top: 0;
-  right: 5%;
-  bottom: 0;
-
-  width: 4cqh;
-  padding-top: 3%;
-  padding-bottom: 3%;
-
   display: flex;
   align-items: center;
   justify-content: center;
 
-  pointer-events: none;
+  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: 100%;
+  width: 50%;
-  height: 100%;
+  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

@@ -1,4 +1,6 @@
 // ChoiceSelect.tsx
+import { useEffect, useRef, useState } from 'react';
+import { createPortal } from 'react-dom';
 import { TriangleDownIcon } from '../../assets/icons/Triangle';
 import './ChoiceSelect.css';
 
@@ -13,6 +15,11 @@ type ChoiceSelectProps<T extends 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,
@@ -23,50 +30,201 @@ function ChoiceSelect<T extends string>({
   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}>
+    <div
-      <select
+      className={`choice-select ${className}`}
+      data-disabled={disabled || undefined}
+      ref={rootRef}
+      style={style}
+    >
+      <button
         id={id}
-        className="choice-select__input"
+        type="button"
-        style={style}
+        ref={triggerRef}
-        value={value}
+        className={'choice-select__trigger' + (open ? ' choice-select__trigger--open' : '')}
-        disabled={disabled}
+        onClick={() => (open ? setOpen(false) : openList())}
-        onChange={(e) => {
+        onKeyDown={handleKeyDown}
-          onChange(e.target.value as T);
-          e.currentTarget.blur();
-        }}
         onWheel={(e) => {
           e.preventDefault();
-
           if (disabled) return;
-
+          if (e.deltaY < 0) step(-1);
-          if (e.deltaY < 0) {
+          else if (e.deltaY > 0) step(1);
-            step(1);
-          } else if (e.deltaY > 0) {
-            step(-1);
-          }
         }}
+        disabled={disabled}
+        aria-haspopup="listbox"
+        aria-expanded={open}
       >
-        {options.map((option) => (
+        <span className="choice-select__label">{formatLabel(value)}</span>
-          <option key={option} value={option}>
+        <span className="choice-select__chevron" aria-hidden="true">
-            {formatLabel(option)}
+          <TriangleDownIcon />
-          </option>
+        </span>
-        ))}
+      </button>
-      </select>
 
-      <span className="choice-select__chevron" aria-hidden="true">
+      {open &&
-        <TriangleDownIcon />
+        coords &&
-      </span>
+        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>
   );
 }

src/components/ChoiceStepper/ChoiceStepper.css

@@ -78,9 +78,15 @@
 }
 
 .choice-stepper[data-disabled] {
-  opacity: 0.5;
+  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

@@ -12,6 +12,23 @@ 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,
@@ -80,6 +97,17 @@ function ChoiceStepperList<T>({
   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) {
@@ -180,21 +208,13 @@ function ChoiceStepperList<T>({
   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}
-        onWheel={(e) => {
-          e.preventDefault();
-
-          if (e.deltaY < 0 && canUp) {
-            stepWheel(1);
-          } else if (e.deltaY > 0 && canDown) {
-            stepWheel(-1);
-          }
-        }}
         onKeyDown={(e) => {
           if (e.key === 'Enter') {
             e.currentTarget.blur();
@@ -256,6 +276,17 @@ function ChoiceStepperRange({
   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) {
@@ -344,21 +375,13 @@ function ChoiceStepperRange({
   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}
-        onWheel={(e) => {
-          e.preventDefault();
-
-          if (e.deltaY < 0 && canUp) {
-            stepWheel(1);
-          } else if (e.deltaY > 0 && canDown) {
-            stepWheel(-1);
-          }
-        }}
         onKeyDown={(e) => {
           if (e.key === 'Enter') {
             e.currentTarget.blur();

src/components/Sidebar/Sidebar.css

@@ -365,3 +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>
   );
 }
@@ -230,6 +302,7 @@ export function Sidebar<T extends string>({
   selectedAppId,
   onAppChange,
   onAppRename,
+  onItemRename,
   expanded,
   onToggle,
 }: {
@@ -241,6 +314,7 @@ export function Sidebar<T extends string>({
   selectedAppId?: string;
   onAppChange: (id: string) => void;
   onAppRename: (name: string) => void;
+  onItemRename?: (id: T, name: string) => void;
   expanded: boolean;
   onToggle: () => void;
 }) {
@@ -298,6 +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

@@ -92,6 +92,23 @@ function formatGainDb(value: number) {
   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;
@@ -104,11 +121,13 @@ function SignalFlowMatrix({
   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;
@@ -137,9 +156,16 @@ function SignalFlowMatrix({
   });
   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);
     };
   }, []);
 
@@ -151,28 +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);
 
-    // Show a small tooltip with the new gain value right next to the cursor,
+    pendingGains.current.set(key, next);
-    // then let it fade away shortly after wheeling stops.
+    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({
+    setGainTooltip({ visible: true, x: e.clientX, y: e.clientY, label: formatGainDb(next) });
-      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) => {
@@ -196,6 +249,7 @@ function SignalFlowMatrix({
   return (
     <div className="signal-flow">
       <svg
+        ref={svgRef}
         viewBox={`0 0 ${W} ${H}`}
         preserveAspectRatio="xMidYMid meet"
         className="signal-flow__svg"
@@ -221,7 +275,9 @@ function SignalFlowMatrix({
                 strokeWidth={LINE_HITBOX_WIDTH}
                 style={{ cursor: 'pointer' }}
                 onClick={() => handleToggle(output, input)}
-                onWheel={connected ? (e) => handleWheelGain(e, output, input) : undefined}
+                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. */}

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

@@ -146,3 +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

@@ -38,6 +38,9 @@ type VerticalSliderProps = {
 
   className?: string;
   style?: React.CSSProperties;
+
+  /** Greys out the slider and blocks all interaction. */
+  disabled?: boolean;
 };
 
 const defaultStep: StepFn = () => 0.1;
@@ -174,6 +177,7 @@ export default function VerticalSlider({
   formatValue,
   showTicks = true,
   scale = 'linear',
+  disabled = false,
   className,
   style,
 }: VerticalSliderProps) {
@@ -240,6 +244,26 @@ export default function VerticalSlider({
     return () => observer.disconnect();
   }, []);
 
+  useEffect(() => {
+    if (!disabled) return;
+
+    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)));
@@ -273,6 +297,8 @@ export default function VerticalSlider({
   }
 
   function handleKeyDown(e: React.KeyboardEvent<HTMLDivElement>) {
+    if (disabled) return;
+
     if (!['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight'].includes(e.key)) {
       return;
     }
@@ -307,6 +333,8 @@ export default function VerticalSlider({
   }
 
   async function handleKeyUp() {
+    if (disabled) return;
+
     if (keyboardValue.current == null) return;
 
     const next = keyboardValue.current;
@@ -323,6 +351,7 @@ export default function VerticalSlider({
   }
 
   function handleWheel(e: WheelEvent) {
+    if (disabled) return;
     e.preventDefault();
 
     wheelEditing.current = true;
@@ -393,6 +422,8 @@ export default function VerticalSlider({
   }
 
   function startDrag(e: React.PointerEvent<HTMLDivElement>) {
+    if (disabled) return;
+
     const target = e.currentTarget;
     dragging.current = true;
     target.setPointerCapture(e.pointerId);
@@ -427,6 +458,11 @@ export default function VerticalSlider({
   }
 
   async function commitEditing() {
+    if (disabled) {
+      setEditingText(null);
+      return;
+    }
+
     if (editingText !== null && editingText !== '' && editingText !== '-') {
       const parsed = Number(editingText);
 
@@ -452,7 +488,10 @@ export default function VerticalSlider({
   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}
@@ -468,7 +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}
@@ -494,6 +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

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

@@ -11,12 +11,14 @@ import {
   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 } from 'react';
+import { useRef, useState, useEffect } from 'react';
 import './ChannelSection.css';
 import ChannelGroup from '../../../../components/ChannelGroup/ChannelGroup';
 import Button from '../../../../components/Button/Button';
@@ -34,6 +36,12 @@ 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({
@@ -128,10 +136,14 @@ function PeqPanelSliders({
   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, next.q, next.filter_type, next.bypass);
+    return setPEQ(next.gain, next.frequency, overrides.q ?? nearestQ, next.filter_type, next.bypass);
   };
 
   return (
@@ -165,9 +177,10 @@ function PeqPanelSliders({
             max={qMax}
             values={PEAK_Q_VALUES}
             formatValue={(v) => v.toFixed(2)}
-            value={peq.q}
+            value={nearestQ}
             onChange={(value) => commit({ q: value })}
-            onInput={(value) => onLiveValue({ ...peq, q: value })}
+            onInput={(value) => onLiveValue({ ...peq, q: nearestQValue(value) })}
+            disabled={qDisabled}
             style={{ width: '100%', flex: '1 1 auto' }}
           />
 
@@ -184,6 +197,7 @@ function PeqPanelSliders({
             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' }}
           />
 
@@ -312,9 +326,16 @@ function PeqBandList({
   bandsOrder: PEQBand[];
 }) {
   const commit = (band: PEQBand, overrides: Partial<PEQ>) => {
-    const peq = liveBands[band] ?? bands[band];
+    const live = liveBands[band] ?? bands[band];
-    const next = { ...peq, ...overrides };
+    const next = { ...live, ...overrides };
-    return setPEQ(band, next.gain, next.frequency, next.q, next.filter_type, next.bypass);
+    return setPEQ(
+      band,
+      next.gain,
+      next.frequency,
+      nearestQValue(next.q),
+      next.filter_type,
+      next.bypass
+    );
   };
 
   return (
@@ -334,6 +355,10 @@ function PeqBandList({
 
         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
@@ -367,9 +392,10 @@ function PeqBandList({
 
             <ChoiceStepper
               className="peq-band-list__stepper"
-              value={peq.q}
+              value={qValue}
               values={qValues}
               formatLabel={(v) => v.toFixed(2)}
+              disabled={qDisabled}
               onChange={(value) => commit(band, { q: value })}
             />
 
@@ -380,6 +406,7 @@ function PeqBandList({
               max={12}
               step={0.1}
               formatLabel={(v) => `${v > 0 ? '+' : ''}${v.toFixed(1)} dB`}
+              disabled={gainDisabled}
               onChange={(value) => commit(band, { gain: value })}
             />
 
@@ -390,7 +417,14 @@ function PeqBandList({
               formatLabel={(v) =>
                 PEQ_FILTERS_LABEL.find((opt) => opt.value === v)?.label ?? String(v)
               }
-              onChange={(value) => commit(band, { filter_type: value, q: 3.0 })}
+              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
@@ -441,6 +475,7 @@ function ChannelSection({
   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);
@@ -461,6 +496,23 @@ function ChannelSection({
 
   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);
@@ -470,12 +522,17 @@ function ChannelSection({
       // Skip only if already flat — nothing to change.
       if (current.gain === 0 && current.filter_type === PEQFilter.Peak) continue;
 
-      await commitPEQ(band, 0, current.frequency, current.q, PEQFilter.Peak, current.bypass);
+      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);
   };
@@ -681,11 +738,32 @@ function ChannelSection({
               bypass={ActivePeq.bypass}
               resetting={resetting}
               onBypass={handleBypassClick}
-              onReset={handleResetPeq}
+              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>
+      )}
     </>
   );
 }

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

@@ -213,7 +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;
@@ -227,9 +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()}
@@ -240,7 +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);
@@ -252,7 +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);

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';
@@ -14,13 +14,14 @@ function ConnectionPanel({
   onConnect: () => void;
   onDisconnect: () => void;
 }) {
-  const statusLabel =
-    dsp.status === 'connected'
-      ? 'Connected'
-      : dsp.status === 'connecting'
-        ? 'Connecting…'
-        : 'Disconnected';
 
+    const statusLabel =
+      isConnected(dsp)
+        ? 'Connected'
+        : dsp.isConnecting
+          ? 'Connecting…'
+          : 'Disconnected';
+          
   return (
     <div className="connection-section">
       <Card className="connection-panel">
@@ -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 ChannelSection from '../InputSection/ChannelSection';
+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':
@@ -147,93 +182,58 @@ function DSP408Panel({ dsp, api }: { dsp: DSP408; api: DSP408Api }) {
       case 'geq':
         return <GeqSection dsp={dsp} setGeqBand={api.setGeqBand} setGeqBypass={api.setGeqBypass} />;
 
-      case 'ina':
+      case 'miscellaneous':
         return (
-          <ChannelSection
+          <MiscellaneousPanel
             dsp={dsp}
-            channel={{ Input: InputChannel.InA }}
+            factoryReset={api.factoryReset}
-            setLowPass={api.setLowPass}
+            copyChannel={api.copyChannel}
-            setHighPass={api.setHighPass}
+            setInputSource={api.setInputSource}
-            setPeq={api.setPeqBand}
+            linkChannels={api.linkChannels}
-            setPeqBypass={api.setPEQBypass}
+            lockDevice={api.lockDevice}
+            setActiveSidebar={setActiveSidebar}
           />
         );
 
-      case 'inb':
+      default: {
-        return (
+        const channel = channelMap[activeSidebar];
-          <ChannelSection
+        return channel ? renderChannel(channel) : null;
-            dsp={dsp}
+      }
-            channel={{ Input: InputChannel.InB }}
-            setLowPass={api.setLowPass}
-            setHighPass={api.setHighPass}
-            setPeq={api.setPeqBand}
-            setPeqBypass={api.setPEQBypass}
-          />
-        );
-
-      case 'inc':
-        return (
-          <ChannelSection
-            dsp={dsp}
-            channel={{ Input: InputChannel.InC }}
-            setLowPass={api.setLowPass}
-            setHighPass={api.setHighPass}
-            setPeq={api.setPeqBand}
-            setPeqBypass={api.setPEQBypass}
-          />
-        );
-
-      case 'ind':
-        return (
-          <ChannelSection
-            dsp={dsp}
-            channel={{ Input: InputChannel.InD }}
-            setLowPass={api.setLowPass}
-            setHighPass={api.setHighPass}
-            setPeq={api.setPeqBand}
-            setPeqBypass={api.setPEQBypass}
-          />
-        );
-
-      case 'out1':
-        return (
-          <ChannelSection
-            dsp={dsp}
-            channel={{ Output: OutputChannel.Out1 }}
-            setLowPass={api.setLowPass}
-            setHighPass={api.setHighPass}
-            setPeq={api.setPeqBand}
-            setPeqBypass={api.setPEQBypass}
-          />
-        );
-
-      default:
-        return 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/GainSection/GainSection.tsx

@@ -1,5 +1,5 @@
 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';
@@ -58,23 +58,33 @@ function getGainCurvePoints(freqs: number[], gainDb: number): CurvePoint[] {
 
 function getPeqCrossoverPoints(
   freqs: number[],
-  peqChain: { bands: Record<string, unknown> },
+  peqChain: {
+    bypass: boolean;
+    bands: Record<PEQBand, PEQ>;
+  },
   crossover: {
-    high_pass: { frequency: number; slope: unknown };
+    high_pass: { frequency: number; slope: CrossoverFilter };
-    low_pass: { frequency: number; slope: unknown };
+    low_pass: { frequency: number; slope: CrossoverFilter };
   }
 ) {
   return sumCurvePoints([
-    getPeqCurvePoints({ freqs, bands: peqChain.bands as any }),
+    ...(peqChain.bypass
+      ? []
+      : [
+          getPeqCurvePoints({
+            freqs,
+            bands: peqChain.bands,
+          }),
+        ]),
     getCrossoverCurvePoints({
       freqs,
       highPass: {
         frequency: crossover.high_pass.frequency,
-        filter_type: crossover.high_pass.slope as any,
+        filter_type: crossover.high_pass.slope,
       },
       lowPass: {
         frequency: crossover.low_pass.frequency,
-        filter_type: crossover.low_pass.slope as any,
+        filter_type: crossover.low_pass.slope,
       },
     }),
   ]);
@@ -86,9 +96,19 @@ function getInputChannelCurves(
   liveGain: number | undefined
 ): ChannelCurves {
   const gain = liveGain ?? state.gain;
+
   const geqValues = GEQ_BANDS_LABEL.map(({ frequency }) => state.geq.gains[frequency] ?? 0);
-  const geq = getGeqCurvePoints({ freqs, values: geqValues, q: GEQ_CURVE_Q });
+
+  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 };

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

@@ -17,7 +17,7 @@ import {
   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';
@@ -175,7 +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%',
@@ -201,7 +201,7 @@ function GeqActions({
           minHeight: 0,
         }}
       >
-        {resetting ? 'Resetting…' : 'Reset'} {/* NEW */}
+        {resetting ? 'Resetting…' : 'Reset'}
       </Button>
     </div>
   );
@@ -219,6 +219,20 @@ function GeqSection({
   const [activeChannel, setActiveChannel] = useState<InputChannel>(INPUT_ORDER[0]);
   const [liveGeq, setLiveGeq] = useState<Partial<Record<InputChannel, LiveBands>>>({});
   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) => ({
@@ -245,6 +259,10 @@ function GeqSection({
     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;
@@ -261,6 +279,11 @@ 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];
@@ -306,12 +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/Matrixsection/Matrixsection.tsx

@@ -13,6 +13,7 @@ import {
 } from '../../constants';
 import { SidebarId } from '../../constants';
 import SignalFlowMatrix from '../../../../components/SignalFlowMatrix/SignalFlowMatrix';
+import { useState } from 'react';
 import './Matrixsection.css';
 
 const GAIN_VALUES: number[] = (() => {
@@ -39,6 +40,12 @@ function getRoutedInputs(dsp: DSP, output: OutputChannel): InputChannel[] {
   return getMatrixRoutes(dsp, output).connected;
 }
 
+function snapToGain(g: number): number {
+  return GAIN_VALUES.reduce((best, v) =>
+    Math.abs(v - g) < Math.abs(best - g) ? v : best
+  );
+}
+
 function MatrixSection({
   dsp,
   setMatrixRouting,
@@ -68,6 +75,21 @@ function MatrixSection({
     void setMatrixGain(input, output, gain);
   };
 
+  const [liveGains, setLiveGains] = useState<Record<string, number>>({});
+
+  // value = number while wheeling, null once the commit is done
+  const previewGain = (input: InputChannel, output: OutputChannel, value: number | null) => {
+    const key = `${input}-${output}`;
+    setLiveGains((prev) => {
+      if (value === null) {
+        if (!(key in prev)) return prev;
+        const { [key]: _removed, ...rest } = prev;
+        return rest;
+      }
+      return { ...prev, [key]: value };
+    });
+  };
+
   return (
     <>
       <div className="matrix-flow">
@@ -76,6 +98,7 @@ function MatrixSection({
           setMatrixRouting={setMatrixRouting}
           setMatrixGain={setMatrixGain}
           setActiveSidebar={setActiveSidebar}
+          onGainPreview={previewGain}
         />
       </div>
       <div className="matrix-section">
@@ -90,7 +113,7 @@ function MatrixSection({
                 <div className="matrix-panel__rows">
                   {INPUT_ORDER.map((input) => {
                     const connected = isRouted(dsp, output, input);
-                    const gain = getLinkGain(dsp, output, input);
+                    const gain = liveGains[`${input}-${output}`] ?? getLinkGain(dsp, output, input);
 
                     return (
                       <div className="matrix-panel__row" key={String(input)}>
@@ -111,7 +134,7 @@ function MatrixSection({
 
                         <ChoiceStepper
                           className="matrix-gain-stepper"
-                          value={gain}
+                          value={snapToGain(gain)}
                           values={GAIN_VALUES}
                           formatLabel={(v: number) => `${v > 0 ? '+' : ''}${v.toFixed(1)} dB`}
                           onChange={(g) => handleGainChange(output, input, g)}

src/features/dsp408/components/MiscellaneousSection/CopyChannelModal.css

@@ -0,0 +1,126 @@
+.copy-channel-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: var(--space-5);
+
+  background: rgba(0, 0, 0, 0.5);
+  animation: copy-channel-fade-in var(--dur-base) var(--ease-standard);
+}
+
+@keyframes copy-channel-fade-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.copy-channel-modal {
+  width: 100%;
+  max-width: 440px;
+  max-height: 90vh;
+  overflow-y: auto;
+
+  animation: copy-channel-scale-in var(--dur-base) var(--ease-standard);
+}
+
+@keyframes copy-channel-scale-in {
+  from {
+    opacity: 0;
+    transform: scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+.copy-channel-modal__header {
+  margin-bottom: var(--space-5);
+}
+
+.copy-channel-modal__header h2 {
+  margin: 0;
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.copy-channel-modal__header p {
+  margin: var(--space-1) 0 0;
+  font-size: var(--font-sm);
+  line-height: 1.4;
+  color: var(--text-muted);
+}
+
+/* Source -> destination */
+
+.copy-channel-modal__transfer {
+  display: flex;
+  align-items: flex-end;
+  gap: var(--space-3);
+}
+
+.copy-channel-modal__field {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-2);
+
+  flex: 1;
+  min-width: 0;
+}
+
+.copy-channel-modal__field label {
+  font-size: var(--font-sm);
+  color: var(--text-muted);
+}
+
+.copy-channel-modal__arrow {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  height: var(--card-control-height);
+  color: var(--text-muted);
+
+  flex: 0 0 auto;
+}
+
+.copy-channel-modal__arrow svg {
+  width: var(--space-5);
+  height: var(--space-5);
+}
+
+.copy-channel-modal__summary {
+  margin: var(--space-3) 0 var(--space-5);
+
+  font-size: var(--font-sm);
+  line-height: 1.4;
+  color: var(--text-muted);
+}
+
+/* Footer actions */
+
+.copy-channel-modal__actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--space-3);
+}
+
+@media (max-width: 600px) {
+  .copy-channel-modal__transfer {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .copy-channel-modal__arrow {
+    height: auto;
+    transform: rotate(90deg);
+  }
+}

src/features/dsp408/components/MiscellaneousSection/CopyChannelModal.tsx

@@ -0,0 +1,141 @@
+import { useEffect, useMemo, useState } from 'react';
+
+import { Channel, InputChannel, OutputChannel } from '../../types';
+import Button from '../../../../components/Button/Button';
+import Card from '../../../../components/Card/Card';
+import ChoiceSelect from '../../../../components/ChoiceSelect/ChoiceSelect';
+
+import './CopyChannelModal.css';
+
+const INPUT_CHANNELS: readonly string[] = Object.values(InputChannel);
+const OUTPUT_CHANNELS: readonly string[] = Object.values(OutputChannel);
+const ALL_CHANNELS: readonly string[] = [...INPUT_CHANNELS, ...OUTPUT_CHANNELS];
+
+const isInputChannel = (raw: string) => INPUT_CHANNELS.includes(raw);
+
+/** Wraps a raw enum string back into the { Input } / { Output } shape. */
+const wrapChannel = (raw: string): Channel =>
+  isInputChannel(raw) ? { Input: raw as InputChannel } : { Output: raw as OutputChannel };
+
+/** The channels a given source can be copied onto: same type, minus itself. */
+const destinationsFor = (source: string): string[] =>
+  (isInputChannel(source) ? INPUT_CHANNELS : OUTPUT_CHANNELS).filter(
+    (channel) => channel !== source
+  );
+
+function CopyChannelModal({
+  onClose,
+  copyChannel,
+}: {
+  onClose: () => void;
+  copyChannel: (channel1: Channel, channel2: Channel) => Promise<boolean>;
+}) {
+  const [source, setSource] = useState<string>(ALL_CHANNELS[0]);
+  const [destination, setDestination] = useState<string>(() => destinationsFor(ALL_CHANNELS[0])[0]);
+  const [isCopying, setIsCopying] = useState(false);
+
+  const destinationOptions = useMemo(() => destinationsFor(source), [source]);
+
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        onClose();
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [onClose]);
+
+  const handleSourceChange = (nextSource: string) => {
+    setSource(nextSource);
+
+    // Picking a source of the other type (or picking the current
+    // destination as source) invalidates the destination.
+    const nextDestinations = destinationsFor(nextSource);
+
+    if (!nextDestinations.includes(destination)) {
+      setDestination(nextDestinations[0]);
+    }
+  };
+
+  const handleCopy = async () => {
+    setIsCopying(true);
+
+    try {
+      await copyChannel(wrapChannel(source), wrapChannel(destination));
+      onClose();
+    } finally {
+      setIsCopying(false);
+    }
+  };
+
+  return (
+    <div
+      className="copy-channel-overlay"
+      onMouseDown={(e) => {
+        if (e.target === e.currentTarget) {
+          onClose();
+        }
+      }}
+    >
+      <Card className="copy-channel-modal">
+        <div className="copy-channel-modal__header">
+          <h2>Copy Channel</h2>
+          <p>
+            Copy every setting of one channel onto another. Channels can only be copied onto
+            channels of the same type.
+          </p>
+        </div>
+
+        <div className="copy-channel-modal__transfer">
+          <div className="copy-channel-modal__field">
+            <label htmlFor="copy-channel-source">From</label>
+
+            <ChoiceSelect<string>
+              id="copy-channel-source"
+              value={source}
+              options={ALL_CHANNELS}
+              onChange={handleSourceChange}
+            />
+          </div>
+
+          <div className="copy-channel-modal__arrow" aria-hidden="true">
+            <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+              <path d="M4 12h15M13 6l6 6-6 6" strokeLinecap="round" strokeLinejoin="round" />
+            </svg>
+          </div>
+
+          <div className="copy-channel-modal__field">
+            <label htmlFor="copy-channel-destination">To</label>
+
+            <ChoiceSelect<string>
+              id="copy-channel-destination"
+              value={destination}
+              options={destinationOptions}
+              onChange={setDestination}
+            />
+          </div>
+        </div>
+
+        <p className="copy-channel-modal__summary">
+          {destination} will take the settings of {source}.
+          <br />
+          This overwrites {destination}.
+        </p>
+
+        <div className="copy-channel-modal__actions">
+          <Button variant="outline" onClick={onClose} disabled={isCopying}>
+            Cancel
+          </Button>
+
+          <Button variant="outline" onClick={handleCopy} disabled={isCopying}>
+            {isCopying ? 'Copying...' : 'Copy'}
+          </Button>
+        </div>
+      </Card>
+    </div>
+  );
+}
+
+export default CopyChannelModal;

src/features/dsp408/components/MiscellaneousSection/LinkChannelsModal.css

@@ -0,0 +1,211 @@
+.link-channels-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  padding: var(--space-5);
+
+  background: rgba(0, 0, 0, 0.5);
+
+  animation: link-channels-fade-in var(--dur-base) var(--ease-standard);
+}
+
+@keyframes link-channels-fade-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.link-channels-modal {
+  width: 100%;
+  max-width: 480px;
+  max-height: 90vh;
+
+  overflow-y: auto;
+
+  animation: link-channels-scale-in var(--dur-base) var(--ease-standard);
+}
+
+@keyframes link-channels-scale-in {
+  from {
+    opacity: 0;
+    transform: scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+.link-channels-modal__header {
+  margin-bottom: var(--space-4);
+}
+
+.link-channels-modal__header h2 {
+  margin: 0;
+
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.link-channels-modal__header p {
+  margin: var(--space-1) 0 0;
+
+  font-size: var(--font-sm);
+  line-height: 1.4;
+  color: var(--text-muted);
+}
+
+/* Mode toggle */
+
+.link-channels-modal__mode-toggle {
+  display: inline-flex;
+
+  padding: var(--space-1);
+  margin-bottom: var(--space-5);
+
+  background: var(--bg-panel);
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+}
+
+.link-channels-modal__mode-btn {
+  padding: var(--space-2) var(--space-4);
+
+  background: transparent;
+  color: var(--text-muted);
+
+  border: none;
+  border-radius: var(--radius-sm);
+
+  font-family: var(--font-ui);
+  font-size: var(--font-sm);
+  font-weight: var(--font-weight-semibold);
+
+  cursor: pointer;
+
+  transition:
+    background var(--dur-base) var(--ease-standard),
+    color var(--dur-base) var(--ease-standard);
+}
+
+.link-channels-modal__mode-btn.is-active {
+  background: var(--accent-brand);
+  color: var(--bg-panel);
+}
+
+/* Triangular link matrix */
+
+.link-matrix {
+  display: grid;
+  gap: var(--space-1);
+
+  margin-bottom: var(--space-5);
+}
+
+.link-matrix__corner {
+  width: var(--space-6);
+}
+
+.link-matrix__col-label,
+.link-matrix__row-label {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  font-family: var(--font-mono);
+  font-size: var(--font-sm);
+  color: var(--text-muted);
+}
+
+.link-matrix__row-label {
+  justify-content: flex-start;
+  padding-right: var(--space-2);
+}
+
+.link-matrix__row {
+  display: contents;
+}
+
+.link-matrix__cell {
+  aspect-ratio: 1 / 1;
+  min-width: 32px;
+
+  border-radius: var(--radius-sm);
+}
+
+.link-matrix__cell--empty {
+  background: transparent;
+}
+
+.link-matrix__cell--toggle {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+
+  background: var(--bg-panel);
+  border: var(--border-width) solid var(--border-hairline);
+
+  cursor: pointer;
+
+  transition:
+    background var(--dur-base) var(--ease-standard),
+    border-color var(--dur-base) var(--ease-standard);
+}
+
+.link-matrix__cell--toggle:hover {
+  border-color: var(--accent-brand);
+}
+
+.link-matrix__cell--toggle.is-active {
+  background: var(--accent-brand);
+  border-color: var(--accent-brand);
+  cursor: default;
+}
+
+.link-matrix__cell--toggle:disabled:hover {
+  border-color: var(--accent-brand);
+}
+
+/* A row whose channel is itself following another channel can't also
+   lead others - its other tiles are locked rather than just inactive. */
+
+.link-matrix__cell--unavailable {
+  background: repeating-linear-gradient(
+    45deg,
+    var(--border-hairline),
+    var(--border-hairline) 2px,
+    transparent 2px,
+    transparent 6px
+  );
+  border-color: var(--border-hairline);
+
+  cursor: not-allowed;
+}
+
+.link-matrix__cell--unavailable:hover {
+  border-color: var(--border-hairline);
+}
+
+/* Footer actions */
+
+.link-channels-modal__actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--space-3);
+}
+
+@media (max-width: 600px) {
+  .link-matrix__cell {
+    min-width: 26px;
+  }
+}

src/features/dsp408/components/MiscellaneousSection/LinkChannelsModal.tsx

@@ -0,0 +1,368 @@
+import { useEffect, useState } from 'react';
+
+import { DSP408 } from '../../../../types';
+import { Channel, InputChannel, OutputChannel } from '../../types';
+import Button from '../../../../components/Button/Button';
+import Card from '../../../../components/Card/Card';
+
+import './LinkChannelsModal.css';
+
+const INPUT_CHANNELS: readonly InputChannel[] = Object.values(InputChannel);
+const OUTPUT_CHANNELS: readonly OutputChannel[] = Object.values(OutputChannel);
+
+type LinkMode = 'input' | 'output';
+
+type LinkGroup = {
+  source: Channel;
+  destinations: Channel[];
+};
+
+/**
+ * Maps every channel (by its raw enum string) to the channel it currently
+ * follows. A channel that follows itself is unlinked. Several channels can
+ * follow the same leader (many-to-one), but a channel that is itself
+ * following someone can't also be followed by others - no chains.
+ */
+type LeaderMap = Record<string, string>;
+
+const wrapInputChannel = (raw: string): Channel => ({ Input: raw as InputChannel });
+const wrapOutputChannel = (raw: string): Channel => ({ Output: raw as OutputChannel });
+
+/**
+ * Gets the raw enum string (InA, Out1, ...) out of a channel entry.
+ * The device state has been observed to store these as plain strings
+ * (e.g. "InA") rather than the wrapped { Input: ... } / { Output: ... }
+ * shape used elsewhere, so this accepts either form defensively.
+ */
+function channelRawId(channel: Channel | string): string {
+  if (typeof channel === 'string') {
+    return channel;
+  }
+
+  return 'Input' in channel ? channel.Input : channel.Output;
+}
+
+/**
+ * Breaks any chains that might be present in a leader map (a channel that
+ * both follows someone and is followed by others) by releasing whoever
+ * follows a follower back to themselves. Keeps the invariant - a channel
+ * can lead or follow, never both - true regardless of what the device
+ * reported.
+ */
+function sanitizeLeaderMap(leaderOf: LeaderMap): LeaderMap {
+  const next = { ...leaderOf };
+
+  Object.keys(next).forEach((channel) => {
+    const leader = next[channel];
+
+    if (leader !== channel && next[leader] !== leader) {
+      // `channel` follows a leader that itself follows someone else -
+      // release `channel` back to itself to break the chain.
+      next[channel] = channel;
+    }
+  });
+
+  return next;
+}
+
+/**
+ * Reads the DSP's real link state (per-channel `linked_channels: Channel[]`)
+ * and turns it into a leader map, so the modal opens already reflecting the
+ * device. Every channel defaults to following itself (unlinked); channels
+ * reported as linked follow whichever channel the device reported first.
+ */
+function extractLeaderMap<T extends string>(
+  states: Partial<Record<T, { linked_channels: (Channel | string)[] }>> | undefined,
+  orderedChannels: readonly T[]
+): LeaderMap {
+  const leaderOf: LeaderMap = {};
+
+  orderedChannels.forEach((channel) => {
+    leaderOf[channel] = channel;
+  });
+
+  if (!states) {
+    return leaderOf;
+  }
+
+  orderedChannels.forEach((channel) => {
+    const state = states[channel];
+
+    if (!state || state.linked_channels.length === 0) {
+      return;
+    }
+
+    const leaderId = channelRawId(state.linked_channels[0]);
+
+    if (leaderId !== channel) {
+      leaderOf[channel] = leaderId;
+    }
+  });
+
+  return sanitizeLeaderMap(leaderOf);
+}
+
+/**
+ * Turns a leader map into one linkChannels call per leader that has
+ * followers (source = leader, destinations = its followers), plus one call
+ * per still-unlinked, follower-less channel with no destinations. Channels
+ * that are themselves following someone don't get their own call - they're
+ * already covered by their leader's call.
+ */
+function buildLinkCalls(
+  leaderOf: LeaderMap,
+  orderedChannels: readonly string[],
+  wrap: (raw: string) => Channel
+): LinkGroup[] {
+  const followersByLeader = new Map<string, string[]>();
+
+  orderedChannels.forEach((channel) => {
+    const leader = leaderOf[channel];
+
+    if (leader === channel) {
+      return;
+    }
+
+    const existing = followersByLeader.get(leader) ?? [];
+    existing.push(channel);
+    followersByLeader.set(leader, existing);
+  });
+
+  const calls: LinkGroup[] = [];
+
+  orderedChannels.forEach((channel) => {
+    const followers = followersByLeader.get(channel);
+
+    if (followers) {
+      calls.push({ source: wrap(channel), destinations: followers.map(wrap) });
+      return;
+    }
+
+    if (leaderOf[channel] === channel) {
+      calls.push({ source: wrap(channel), destinations: [] });
+    }
+  });
+
+  return calls;
+}
+
+function LinkChannelsModal({
+  dsp,
+  onClose,
+  linkChannels,
+}: {
+  dsp: DSP408;
+  onClose: () => void;
+  linkChannels: (source: Channel, destinations: Channel[]) => Promise<boolean>;
+}) {
+  const [mode, setMode] = useState<LinkMode>('input');
+
+  const [inputLeaders, setInputLeaders] = useState<LeaderMap>(() =>
+    extractLeaderMap(dsp.state?.current_config?.input_states, INPUT_CHANNELS)
+  );
+
+  const [outputLeaders, setOutputLeaders] = useState<LeaderMap>(() =>
+    extractLeaderMap(dsp.state?.current_config?.output_states, OUTPUT_CHANNELS)
+  );
+
+  const [isSaving, setIsSaving] = useState(false);
+
+  const channels: readonly string[] = mode === 'input' ? INPUT_CHANNELS : OUTPUT_CHANNELS;
+  const leaderOf = mode === 'input' ? inputLeaders : outputLeaders;
+  const setLeaderOf = mode === 'input' ? setInputLeaders : setOutputLeaders;
+
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        onClose();
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [onClose]);
+
+  const followChannel = (follower: string, leader: string) => {
+    setLeaderOf((prev) => {
+      const next = { ...prev };
+
+      // `follower` can no longer lead anyone once it follows `leader` -
+      // release whoever currently follows `follower` back to themselves.
+      Object.keys(next).forEach((channel) => {
+        if (next[channel] === follower) {
+          next[channel] = channel;
+        }
+      });
+
+      next[follower] = leader;
+
+      return next;
+    });
+  };
+
+  const unlinkChannel = (channel: string) => {
+    setLeaderOf((prev) => ({ ...prev, [channel]: channel }));
+  };
+
+  const handleCellClick = (row: string, col: string) => {
+    const isSelf = row === col;
+
+    if (isSelf) {
+      if (leaderOf[row] !== row) {
+        unlinkChannel(row);
+      }
+
+      return;
+    }
+
+    if (leaderOf[row] !== row || leaderOf[col] === row) {
+      // Row is locked (it's itself following someone) or this pair is
+      // already the current state - nothing to do.
+      return;
+    }
+
+    followChannel(col, row);
+  };
+
+  const handleValidate = async () => {
+    setIsSaving(true);
+
+    try {
+      const groups = [
+        ...buildLinkCalls(inputLeaders, INPUT_CHANNELS, wrapInputChannel),
+        ...buildLinkCalls(outputLeaders, OUTPUT_CHANNELS, wrapOutputChannel),
+      ];
+
+      for (const group of groups) {
+        // eslint-disable-next-line no-await-in-loop
+        await linkChannels(group.source, group.destinations);
+      }
+
+      onClose();
+    } finally {
+      setIsSaving(false);
+    }
+  };
+
+  return (
+    <div
+      className="link-channels-overlay"
+      onMouseDown={(e) => {
+        if (e.target === e.currentTarget) {
+          onClose();
+        }
+      }}
+    >
+      <Card className="link-channels-modal">
+        <div className="link-channels-modal__header">
+          <h2>Link Channels</h2>
+          <p>
+            Link one or more channels to a single channel. A channel not linked to another is linked
+            to itself.
+          </p>
+        </div>
+
+        <div className="link-channels-modal__mode-toggle" role="tablist" aria-label="Channel type">
+          <button
+            type="button"
+            role="tab"
+            aria-selected={mode === 'input'}
+            className={`link-channels-modal__mode-btn ${mode === 'input' ? 'is-active' : ''}`}
+            onClick={() => setMode('input')}
+          >
+            Input
+          </button>
+
+          <button
+            type="button"
+            role="tab"
+            aria-selected={mode === 'output'}
+            className={`link-channels-modal__mode-btn ${mode === 'output' ? 'is-active' : ''}`}
+            onClick={() => setMode('output')}
+          >
+            Output
+          </button>
+        </div>
+
+        <div
+          className="link-matrix"
+          style={{ gridTemplateColumns: `auto repeat(${channels.length}, 1fr)` }}
+        >
+          <div className="link-matrix__corner" />
+
+          {channels.map((col) => (
+            <div className="link-matrix__col-label" key={`col-${col}`}>
+              {col}
+            </div>
+          ))}
+
+          {channels.map((row, rowIndex) => {
+            const isRowLocked = leaderOf[row] !== row;
+
+            return (
+              <div className="link-matrix__row" key={`row-${row}`}>
+                <div className="link-matrix__row-label">{row}</div>
+
+                {channels.map((col, colIndex) => {
+                  if (colIndex < rowIndex) {
+                    return (
+                      <div
+                        className="link-matrix__cell link-matrix__cell--empty"
+                        key={`cell-${row}-${col}`}
+                      />
+                    );
+                  }
+
+                  const isSelf = row === col;
+                  const isActive = isSelf ? leaderOf[row] === row : leaderOf[col] === row;
+                  const isUnavailable = !isSelf && !isActive && isRowLocked;
+
+                  const label = isSelf
+                    ? isActive
+                      ? `${row} not linked`
+                      : `Unlink ${row}`
+                    : isUnavailable
+                      ? `${row} is already linked to another channel`
+                      : isActive
+                        ? `${col} linked to ${row}`
+                        : `Link ${col} to ${row}`;
+
+                  return (
+                    <button
+                      type="button"
+                      key={`cell-${row}-${col}`}
+                      className={[
+                        'link-matrix__cell',
+                        'link-matrix__cell--toggle',
+                        isUnavailable && 'link-matrix__cell--unavailable',
+                        isActive && 'is-active',
+                      ]
+                        .filter(Boolean)
+                        .join(' ')}
+                      aria-pressed={isActive}
+                      disabled={isActive || isUnavailable}
+                      aria-label={label}
+                      onClick={() => handleCellClick(row, col)}
+                    />
+                  );
+                })}
+              </div>
+            );
+          })}
+        </div>
+
+        <div className="link-channels-modal__actions">
+          <Button variant="outline" onClick={onClose} disabled={isSaving}>
+            Cancel
+          </Button>
+
+          <Button variant="outline" onClick={handleValidate} disabled={isSaving}>
+            {isSaving ? 'Linking...' : 'Validate'}
+          </Button>
+        </div>
+      </Card>
+    </div>
+  );
+}
+
+export default LinkChannelsModal;

src/features/dsp408/components/MiscellaneousSection/MiscellaneousSection.css

@@ -0,0 +1,250 @@
+.miscellaneous-section {
+  width: 100%;
+  min-height: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
+.miscellaneous-panel {
+  width: 100%;
+  max-width: 720px;
+}
+
+/* Sections */
+
+.miscellaneous-panel__section {
+  padding-top: var(--space-2);
+  margin-top: var(--space-2);
+
+  border-top: var(--border-width) solid var(--border-hairline);
+}
+
+.miscellaneous-panel__section:first-of-type {
+  padding-top: 0;
+  margin-top: 0;
+  border-top: none;
+}
+
+.miscellaneous-panel__section-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.miscellaneous-panel__section-header h2 {
+  margin: 0;
+
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.miscellaneous-panel__section-header p {
+  margin: 0;
+
+  font-size: var(--font-sm);
+  line-height: 1.4;
+  color: var(--text-muted);
+}
+
+/* Fields */
+
+.miscellaneous-panel__row {
+  display: flex;
+  gap: var(--space-3);
+}
+
+.miscellaneous-panel__field {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+
+  flex: 1;
+  min-width: 0;
+
+  font-family: var(--font-mono);
+}
+
+.miscellaneous-panel__field label {
+  font-size: var(--font-sm);
+  color: var(--text-muted);
+}
+
+.miscellaneous-panel__field input {
+  height: var(--card-control-height);
+  padding: 0 var(--space-3);
+
+  background: var(--bg-panel);
+  color: var(--text-primary);
+
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+
+  font-family: var(--font-ui);
+  font-size: var(--font-sm);
+
+  outline: none;
+
+  appearance: none;
+  -webkit-appearance: none;
+
+  transition: border-color var(--dur-base) var(--ease-standard);
+}
+
+.miscellaneous-panel__field input.mono {
+  font-family: var(--font-mono);
+  font-weight: var(--font-weight-normal);
+}
+
+.miscellaneous-panel__field input:focus {
+  border-color: var(--accent-brand);
+}
+
+.miscellaneous-panel__field input::placeholder {
+  color: var(--text-muted);
+  opacity: 0.5;
+}
+
+/* Stepper */
+
+.miscellaneous-panel__choice-select {
+  height: var(--card-control-height);
+  min-height: var(--card-control-height);
+  max-height: var(--card-control-height);
+  box-sizing: border-box;
+  flex-shrink: 0;
+}
+
+/* Actions */
+
+.miscellaneous-panel__actions {
+  display: flex;
+  justify-content: flex-end;
+  align-items: center;
+  gap: var(--space-3);
+
+  margin-top: var(--space-2);
+}
+
+/* Danger */
+
+.miscellaneous-panel__section--danger {
+  padding-top: var(--space-2);
+}
+
+.miscellaneous-panel__section--danger .miscellaneous-panel__section-header p {
+  max-width: 560px;
+}
+
+/* Password Input */
+
+.miscellaneous-panel__password-wrap {
+  position: relative;
+  width: 100%;
+}
+
+.miscellaneous-panel__password-wrap input {
+  width: 100%;
+}
+
+.miscellaneous-panel__password-toggle {
+  position: absolute;
+  top: 50%;
+  right: 3%;
+  transform: translateY(-50%);
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  width: auto;
+  height: 100%;
+
+  padding: 0;
+  border: none;
+  background: transparent;
+  color: var(--accent-brand);
+
+  cursor: pointer;
+}
+
+.miscellaneous-panel__password-toggle:hover {
+  color: var(--text-muted);
+}
+
+.miscellaneous-panel__password-toggle svg {
+  width: auto;
+  height: 65%;
+}
+
+
+
+/* Mobile */
+
+@media (max-width: 600px) {
+  .miscellaneous-panel__row {
+    flex-direction: column;
+  }
+
+  .miscellaneous-panel__actions {
+    justify-content: flex-start;
+    flex-wrap: wrap;
+  }
+}
+
+.miscellaneous-panel {
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.miscellaneous-panel input,
+.miscellaneous-panel select {
+  user-select: text;
+  -webkit-user-select: text;
+}
+
+.confirm-modal-overlay {
+  position: fixed;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  background: rgba(0, 0, 0, 0.5);
+  z-index: 1000;
+}
+
+.confirm-modal {
+  width: 100%;
+  max-width: 400px;
+  padding: var(--space-5);
+  margin: var(--space-4);
+
+  background: var(--bg-panel);
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-md);
+}
+
+.confirm-modal h3 {
+  margin: 0 0 var(--space-2);
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.confirm-modal p {
+  margin: 0;
+  font-size: var(--font-sm);
+  line-height: 1.4;
+  color: var(--text-muted);
+}
+
+.confirm-modal__actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--space-3);
+  margin-top: var(--space-5);
+}
+
+

src/features/dsp408/components/MiscellaneousSection/MiscellaneousSection.tsx

@@ -0,0 +1,257 @@
+import { useState } from 'react';
+
+import { DSP408 } from '../../../../types';
+import { Channel, InputSource, InputType, DiscreteFrequency } from '../../types';
+import { SidebarId } from '../../constants';
+import Button from '../../../../components/Button/Button';
+import Card from '../../../../components/Card/Card';
+import ChoiceSelect from '../../../../components/ChoiceSelect/ChoiceSelect';
+import LinkChannelsModal from './LinkChannelsModal';
+import CopyChannelModal from './CopyChannelModal';
+
+import './MiscellaneousSection.css';
+import { EyeIcon, EyeOffIcon } from '../../../../assets/icons/EyesIcons';
+
+const INPUT_TYPES: readonly InputType[] = Object.values(InputType);
+const DISCRETE_FREQUENCIES: readonly DiscreteFrequency[] = Object.values(DiscreteFrequency);
+
+function MiscellaneousPanel({
+  dsp,
+  factoryReset,
+  copyChannel,
+  setInputSource,
+  linkChannels,
+  lockDevice,
+  setActiveSidebar,
+}: {
+  dsp: DSP408;
+  factoryReset: (force: boolean) => Promise<boolean>;
+  copyChannel: (channel1: Channel, channel2: Channel) => Promise<boolean>;
+  setInputSource: (inputSource: InputSource) => Promise<boolean>;
+  linkChannels: (source: Channel, destinations: Channel[]) => Promise<boolean>;
+  lockDevice: (password: string) => Promise<boolean>;
+  setActiveSidebar: (id: SidebarId) => void;
+}) {
+  const [isFactoryResetting, setIsFactoryResetting] = useState(false);
+  const [isResetConfirmOpen, setIsResetConfirmOpen] = useState(false);
+  const [isLinkModalOpen, setIsLinkModalOpen] = useState(false);
+  const [isCopyModalOpen, setIsCopyModalOpen] = useState(false);
+
+  const [liveInputSource, setLiveInputSource] = useState<InputSource | null>(null);
+  const inputSource = liveInputSource ?? dsp.state.current_config.input_source;
+
+  const [password, setPassword] = useState('');
+  const [isPasswordVisible, setIsPasswordVisible] = useState(false);
+
+  const handleInputTypeChange = async (type: InputType) => {
+    const nextSource: InputSource = {
+      type,
+      frequency: type === InputType.SineWave ? inputSource.frequency : DiscreteFrequency.F20,
+    };
+
+    setLiveInputSource(nextSource);
+    const success = await setInputSource(nextSource);
+
+    if (success) setLiveInputSource(null);
+  };
+
+  const handleFrequencyChange = async (frequency: DiscreteFrequency) => {
+    const nextSource: InputSource = { ...inputSource, frequency };
+
+    setLiveInputSource(nextSource);
+    const success = await setInputSource(nextSource);
+
+    if (success) setLiveInputSource(null);
+  };
+
+  const handleFactoryReset = () => {
+    setIsResetConfirmOpen(true);
+  };
+
+  const confirmFactoryReset = async () => {
+    setIsResetConfirmOpen(false);
+    setIsFactoryResetting(true);
+
+    try {
+      await factoryReset(true);
+    } finally {
+      setIsFactoryResetting(false);
+    }
+  };
+
+  const handleLock = async () => {
+    if (!password) {
+      return;
+    }
+
+    const success = await lockDevice(password);
+
+    if (success) {
+      setPassword('');
+      setActiveSidebar('overview');
+    }
+  };
+
+  return (
+    <div className="miscellaneous-section">
+      <Card className="miscellaneous-panel">
+        {/* Input Source */}
+        <section className="miscellaneous-panel__section">
+          <div className="miscellaneous-panel__section-header">
+            <h2>Input Source</h2>
+            <p>Select the signal source used by the DSP.</p>
+          </div>
+
+          <div className="miscellaneous-panel__row">
+            <div className="miscellaneous-panel__field">
+              <label htmlFor="misc-input-type">Source</label>
+
+              <ChoiceSelect<InputType>
+                id="misc-input-type"
+                className='miscellaneous-panel__choice-select'
+                value={inputSource.type}
+                options={INPUT_TYPES}
+                onChange={handleInputTypeChange}
+                style={{ color: 'var(--font-primary)' }}
+              />
+            </div>
+
+            {inputSource.type === InputType.SineWave && (
+              <div className="miscellaneous-panel__field">
+                <label htmlFor="misc-frequency">Frequency</label>
+
+                <ChoiceSelect<DiscreteFrequency>
+                  id="misc-frequency"
+                  className='miscellaneous-panel__choice-select'
+                  value={inputSource.frequency}
+                  options={DISCRETE_FREQUENCIES}
+                  formatLabel={(frequency) => {
+                    if (frequency === DiscreteFrequency.F31_5) {
+                      return '31.5 Hz';
+                    }
+
+                    return `${frequency.slice(1)} Hz`;
+                  }}
+                  onChange={handleFrequencyChange}
+                  style={{ color: 'var(--font-primary)' }}
+                />
+              </div>
+            )}
+          </div>
+        </section>
+
+        {/* Channel Tools */}
+        <section className="miscellaneous-panel__section">
+          <div className="miscellaneous-panel__section-header">
+            <h2>Channel Tools</h2>
+            <p>Copy settings between channels or link multiple channels.</p>
+          </div>
+
+          <div className="miscellaneous-panel__actions">
+            <Button variant="outline" onClick={() => setIsCopyModalOpen(true)}>
+              Copy Channel
+            </Button>
+
+            <Button variant="outline" onClick={() => setIsLinkModalOpen(true)}>
+              Link Channels
+            </Button>
+          </div>
+        </section>
+
+        {/* Security */}
+        <section className="miscellaneous-panel__section">
+          <div className="miscellaneous-panel__section-header">
+            <h2>Device Security</h2>
+            <p>Lock access to the DSP.</p>
+          </div>
+
+          <div className="miscellaneous-panel__field">
+            <label htmlFor="misc-password">Password</label>
+
+            <div className="miscellaneous-panel__password-wrap">
+              <input
+                id="misc-password"
+                type={isPasswordVisible ? 'text' : 'password'}
+                maxLength={4}
+                value={password}
+                placeholder="Enter password"
+                onChange={(e) => {
+                  const value = e.target.value;
+
+                  if (/^[\x20-\x7E]*$/.test(value)) {
+                    setPassword(value);
+                  }
+                }}
+              />
+
+              <button
+                type="button"
+                className="miscellaneous-panel__password-toggle"
+                onClick={() => setIsPasswordVisible((v) => !v)}
+                aria-label={isPasswordVisible ? 'Hide password' : 'Show password'}
+                aria-pressed={isPasswordVisible}
+                tabIndex={-1}
+              >
+                {isPasswordVisible ? <EyeOffIcon /> : <EyeIcon />}
+              </button>
+            </div>
+          </div>
+
+          <div className="miscellaneous-panel__actions">
+            <Button variant="outline" onClick={handleLock} disabled={password.length !== 4}>
+              Lock Device
+            </Button>
+          </div>
+        </section>
+
+        {/* Factory Reset */}
+        <section className="miscellaneous-panel__section miscellaneous-panel__section--danger">
+          <div className="miscellaneous-panel__section-header">
+            <h2>Factory Reset</h2>
+            <p>Restore the DSP to its factory configuration. This cannot be undone.</p>
+          </div>
+
+          <div className="miscellaneous-panel__actions">
+            <Button variant="outline" onClick={handleFactoryReset} disabled={isFactoryResetting}>
+              {isFactoryResetting ? 'Resetting...' : 'Factory Reset'}
+            </Button>
+          </div>
+        </section>
+      </Card>
+
+      {isLinkModalOpen && (
+        <LinkChannelsModal
+          dsp={dsp}
+          onClose={() => setIsLinkModalOpen(false)}
+          linkChannels={linkChannels}
+        />
+      )}
+
+      {isCopyModalOpen && (
+        <CopyChannelModal onClose={() => setIsCopyModalOpen(false)} copyChannel={copyChannel} />
+      )}
+
+      {isResetConfirmOpen && (
+        <div className="confirm-modal-overlay" onClick={() => setIsResetConfirmOpen(false)}>
+          <div className="confirm-modal" onClick={(e) => e.stopPropagation()}>
+            <h3>Factory Reset DSP?</h3>
+            <p>
+              This will restore the DSP to its factory configuration. This action cannot be undone.
+            </p>
+
+            <div className="confirm-modal__actions">
+              <Button variant="outline" onClick={() => setIsResetConfirmOpen(false)}>
+                Cancel
+              </Button>
+              <Button variant="primary" onClick={confirmFactoryReset}>
+                Factory Reset
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default MiscellaneousPanel;

src/features/dsp408/components/PasswordDialog/PasswordDialog.css

@@ -0,0 +1,204 @@
+.password-dialog-overlay {
+  position: fixed;
+  inset: 0;
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  padding: var(--space-4);
+
+  background: rgba(0, 0, 0, 0.55);
+
+  z-index: 1000;
+
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.password-dialog {
+  width: 340px;
+  max-width: 100%;
+
+  display: flex;
+  flex-direction: column;
+
+  animation: password-dialog-enter 120ms ease-out;
+}
+
+/* Header */
+
+.password-dialog__header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+
+  gap: var(--space-3);
+
+  min-width: 0;
+}
+
+.password-dialog__header-text {
+  flex: 1;
+  min-width: 0;
+}
+
+.password-dialog__title {
+  margin: 0;
+
+  font-size: var(--font-lg);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.password-dialog__type {
+  margin-top: var(--space-1);
+
+  font-size: var(--font-sm);
+  color: var(--text-muted);
+
+  font-family: var(--font-mono);
+  letter-spacing: 0.03em;
+
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* Content */
+
+.password-dialog__content {
+  margin-top: var(--space-5);
+}
+
+.password-dialog__field {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-2);
+}
+
+.password-dialog__field label {
+  font-size: var(--font-sm);
+  color: var(--text-muted);
+}
+
+/* Password */
+
+.password-dialog__password-wrap {
+  position: relative;
+  width: 100%;
+}
+
+.password-dialog__password-wrap input {
+  width: 100%;
+  height: var(--card-control-height);
+
+  box-sizing: border-box;
+
+  padding: 0 var(--space-3);
+
+  padding-right: calc(var(--space-3) + 28px);
+
+  background: var(--bg-panel);
+  color: var(--text-primary);
+
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-sm);
+
+  font-family: var(--font-mono);
+  font-size: var(--font-sm);
+
+  outline: none;
+
+  appearance: none;
+  -webkit-appearance: none;
+
+  transition:
+    border-color var(--dur-base) var(--ease-standard),
+    box-shadow var(--dur-base) var(--ease-standard);
+}
+
+.password-dialog__password-wrap input:focus {
+  border-color: var(--accent-brand);
+
+  box-shadow:
+    0 0 0 2px
+    color-mix(in srgb, var(--accent-brand) 20%, transparent);
+}
+
+.password-dialog__password-wrap input::placeholder {
+  color: var(--text-muted);
+  opacity: 0.5;
+}
+
+.password-dialog__password-toggle {
+  position: absolute;
+  top: 50%;
+  right: var(--space-2);
+
+  transform: translateY(-50%);
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  width: 28px;
+  height: 28px;
+
+  padding: 0;
+
+  border: none;
+  background: transparent;
+
+  color: var(--accent-brand);
+
+  cursor: pointer;
+}
+
+.password-dialog__password-toggle:hover {
+  color: var(--text-muted);
+}
+
+.password-dialog__password-toggle svg {
+  width: auto;
+  height: 65%;
+}
+
+/* Actions */
+
+.password-dialog__actions {
+  margin-top: var(--space-5);
+
+  display: flex;
+  justify-content: flex-end;
+  align-items: center;
+
+  gap: var(--space-3);
+}
+
+/* Animation */
+
+@keyframes password-dialog-enter {
+  from {
+    opacity: 0;
+    transform: translateY(4px) scale(0.98);
+  }
+
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+
+.password-dialog__password-wrap input::-ms-reveal,
+.password-dialog__password-wrap input::-ms-clear {
+  display: none;
+}
+
+.password-dialog__password-wrap input::-webkit-credentials-auto-fill-button {
+  display: none;
+}

src/features/dsp408/components/PasswordDialog/PasswordDialog.tsx

@@ -0,0 +1,116 @@
+import { useState } from 'react';
+
+import Button from '../../../../components/Button/Button';
+import Card from '../../../../components/Card/Card';
+import { EyeIcon, EyeOffIcon } from '../../../../assets/icons/EyesIcons';
+
+import './PasswordDialog.css';
+
+export function PasswordDialog({
+  name,
+  onSubmit,
+  onCancel,
+}: {
+  name: string;
+  onSubmit: (password: string) => void;
+  onCancel: () => void;
+}) {
+  const [password, setPassword] = useState('');
+  const [isPasswordVisible, setIsPasswordVisible] = useState(false);
+
+  const handleSubmit = () => {
+    if (password.length === 4) {
+      onSubmit(password);
+    }
+  };
+
+  const handlePasswordChange = (value: string) => {
+    if (/^[\x20-\x7E]*$/.test(value) && value.length <= 4) {
+      setPassword(value);
+    }
+  };
+
+  const handleOverlayClick = (e: React.MouseEvent<HTMLDivElement>) => {
+    if (e.target === e.currentTarget) {
+      onCancel();
+    }
+  };
+
+  return (
+    <div
+      className="password-dialog-overlay"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="password-dialog-title"
+      onMouseDown={handleOverlayClick}
+    >
+      <div className="password-dialog-wrapper">
+        <Card className="password-dialog">
+          <div className="password-dialog__header">
+            <div className="password-dialog__header-text">
+              <h1 id="password-dialog-title" className="password-dialog__title">
+                Device Locked
+              </h1>
+
+              <div className="password-dialog__type" title={name}>
+                {name}
+              </div>
+            </div>
+          </div>
+
+          <div className="password-dialog__content">
+            <div className="password-dialog__field">
+              <label htmlFor="device-password">Password</label>
+
+              <div className="password-dialog__password-wrap">
+                <input
+                  id="device-password"
+                  type={isPasswordVisible ? 'text' : 'password'}
+                  value={password}
+                  maxLength={4}
+                  autoFocus
+                  autoComplete="off"
+                  onChange={(e) => handlePasswordChange(e.target.value)}
+                  onKeyDown={(e) => {
+                    if (e.key === 'Enter' && password.length === 4) {
+                      handleSubmit();
+                    }
+
+                    if (e.key === 'Escape') {
+                      onCancel();
+                    }
+                  }}
+                />
+
+                <button
+                  type="button"
+                  className="password-dialog__password-toggle"
+                  onClick={() => setIsPasswordVisible((visible) => !visible)}
+                  aria-label={isPasswordVisible ? 'Hide password' : 'Show password'}
+                  aria-pressed={isPasswordVisible}
+                  tabIndex={-1}
+                >
+                  {isPasswordVisible ? <EyeOffIcon /> : <EyeIcon />}
+                </button>
+              </div>
+            </div>
+          </div>
+
+          <div className="password-dialog__actions">
+            <Button variant="outline" onClick={onCancel}>
+              Cancel
+            </Button>
+
+            <Button
+              variant="primary"
+              disabled={password.length !== 4}
+              onClick={handleSubmit}
+            >
+              Unlock
+            </Button>
+          </div>
+        </Card>
+      </div>
+    </div>
+  );
+}

src/features/dsp408/constants.ts

@@ -225,6 +225,20 @@ export const PEQ_FILTERS_LABEL: { value: PEQFilter; label: string }[] = [
   { value: PEQFilter.AllPass2, label: 'All Pass 2' },
 ];
 
+/** Filter types that ignore Q (first-order filters). */
+export const PEQ_Q_UNUSED = new Set<PEQFilter>([
+  PEQFilter.Lp6Db,
+  PEQFilter.Hp6Db,
+  PEQFilter.AllPass1,
+]);
+
+/** Filter types that ignore gain (everything except Peak and the shelves). */
+export const PEQ_GAIN_USED = new Set<PEQFilter>([
+  PEQFilter.Peak,
+  PEQFilter.LowShelf,
+  PEQFilter.HighShelf,
+]);
+
 export const FREQUENCY_MIN = 19.7;
 export const FREQUENCY_MAX = 20160;
 export const FREQUENCY_QUANTIZATION = 300;

src/features/dsp408/dsp408.ts

@@ -12,6 +12,7 @@ import {
   PEQBand,
   InputSource,
   DSP408Snapshot,
+  DSPMode,
 } from './types';
 import { SetDsps, NotifyFn, updateDSP, setPollingPaused } from '../../dsp/dspShared';
 import { registerPollStopper } from '../../dsp/pollRegistry';
@@ -25,7 +26,7 @@ export type DSP408Api = ReturnType<typeof forDSP408>;
 const selectedIds = new Set<number>();
 const pollIntervals = new Map<number, ReturnType<typeof setInterval>>();
 
-const ACTIVE_POLL_INTERVAL_MS = 1000;
+const ACTIVE_POLL_INTERVAL_MS = 100;
 const BACKGROUND_POLL_INTERVAL_MS = 5000;
 
 function pollIntervalFor(id: number): number {
@@ -117,8 +118,8 @@ export async function create(params: {
     ip: params.ip,
     port: params.port,
     deviceId: params.deviceId,
-    mode: snapshot.mode,
+    mode: params.demo ? DSPMode.Demo: DSPMode.Normal,
-    status: 'disconnected',
+    isConnecting: false,
     pollingPaused: true,
     state: snapshot.state,
     input_meters: snapshot.input_meters,
@@ -127,16 +128,61 @@ export async function create(params: {
 }
 
 export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
-  async function updateDSPState(): Promise<void> {
+  async function updateDSPState(): Promise<DSP408['state']> {
     try {
       const state = await invoke<DSP408['state']>('get_dsp_state', { id: dsp.id });
+
       updateDSP(setDsps, dsp.id, (d) => ({ ...d, state }) as DSP408);
+
+      return state;
     } catch (err) {
       notify(`Failed to fetch state: ${String(err)}`, 'error', dsp.name);
       throw err;
     }
   }
 
+  const isLocked = (s: DSP408['state']) => s.flags.is_locked;
+
+  async function abortLocked() {
+    await invoke('disconnect_dsp408', { id: dsp.id }).catch(() => {});
+    
+    updateDSPState();
+    updateDSP(setDsps, dsp.id, (d) => ({ ...d, isConnecting: false, passwordRequired: true }));
+  }
+
+  async function connectInternal(password?: string) {
+    updateDSP(setDsps, dsp.id, (d) => ({ ...d, isConnecting: true, passwordRequired: false }));
+    try {
+      await invoke('connect_dsp408', { id: dsp.id });
+
+      let state = await updateDSPState();
+
+      if (isLocked(state)) {
+        if (password === undefined) {
+          await abortLocked();
+          return;
+        }
+
+        await invoke('unlock_device', { id: dsp.id, password });
+
+        state = await updateDSPState();
+
+        if (isLocked(state)) {
+          await abortLocked();
+          notify('Wrong password', 'error', dsp.name);
+          return;
+        }
+      }
+
+      updateDSP(setDsps, dsp.id, (d) => ({ ...d, isConnecting: false, pollingPaused: false }));
+      notify('Connected', 'success', dsp.name);
+      startPolling(dsp, setDsps);
+    } catch (err) {
+      updateDSP(setDsps, dsp.id, (d) => ({ ...d, isConnecting: false }));
+      notify(`Connection failed: ${String(err)}`, 'error', dsp.name);
+    }
+  }
+
   return {
     type: 'DSP408' as const,
 
@@ -155,22 +201,10 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
     updateDSPState,
 
-    async connect() {
+    connect: () => connectInternal(),
-      updateDSP(setDsps, dsp.id, (d) => ({ ...d, status: 'connecting' }));
+    connectWithPassword: (password: string) => connectInternal(password),
-      try {
+    cancelPassword() {
-        await invoke('connect_dsp408', { id: dsp.id });
+      updateDSP(setDsps, dsp.id, (d) => ({ ...d, passwordRequired: false }));
-
-        await updateDSPState();
-
-        updateDSP(setDsps, dsp.id, (d) => ({ ...d, status: 'connected', pollingPaused: false }));
-
-        notify('Connected', 'success', dsp.name);
-
-        startPolling(dsp, setDsps);
-      } catch (err) {
-        updateDSP(setDsps, dsp.id, (d) => ({ ...d, status: 'disconnected' }));
-        notify(`Connection failed: ${String(err)}`, 'error', dsp.name);
-      }
     },
 
     async disconnect() {
@@ -181,9 +215,10 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
           await invoke('disconnect_dsp408', { id: dsp.id });
         });
 
+        await updateDSPState();
+
         updateDSP(setDsps, dsp.id, (d) => ({
           ...d,
-          status: 'disconnected',
           pollingPaused: true,
         }));
 
@@ -720,6 +755,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify(`Preset stored in ${dsp.state.presets.names[presetIndex]}`, 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Store configuration failed: ${String(err)}`, 'error', dsp.name);
@@ -746,6 +783,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify('Factory reset completed', 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Factory reset failed: ${String(err)}`, 'error', dsp.name);
@@ -769,6 +808,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify('Channels copied successfully', 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Channel copy failed: ${String(err)}`, 'error', dsp.name);
@@ -791,6 +832,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify('Input source updated', 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Input source update failed: ${String(err)}`, 'error', dsp.name);
@@ -814,6 +857,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify('Channels linked successfully', 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Channel linking failed: ${String(err)}`, 'error', dsp.name);
@@ -837,6 +882,8 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
 
           await updateDSPState();
 
+          notify('Channel name updated', 'success', dsp.name);
+
           return true;
         } catch (err) {
           notify(`Channel name update failed: ${String(err)}`, 'error', dsp.name);
@@ -844,5 +891,53 @@ export function forDSP408(dsp: DSP408, setDsps: SetDsps, notify: NotifyFn) {
         }
       });
     },
+
+    async unlockDevice(password: string): Promise<boolean> {
+      return withPollingPaused(dsp, setDsps, async () => {
+        try {
+          const success = await invoke<boolean>('unlock_device', {
+            id: dsp.id,
+            password,
+          });
+
+          if (!success) {
+            return false;
+          }
+
+          await updateDSPState();
+
+          notify('Device unlocked', 'success', dsp.name);
+
+          return true;
+        } catch (err) {
+          notify(`Unlock failed: ${String(err)}`, 'error', dsp.name);
+          return false;
+        }
+      });
+    },
+
+    async lockDevice(password: string): Promise<boolean> {
+      return withPollingPaused(dsp, setDsps, async () => {
+        try {
+          const success = await invoke<boolean>('lock_device', {
+            id: dsp.id,
+            password,
+          });
+
+          if (!success) {
+            return false;
+          }
+
+          await updateDSPState();
+
+          notify('Device locked', 'success', dsp.name);
+
+          return true;
+        } catch (err) {
+          notify(`Lock failed: ${String(err)}`, 'error', dsp.name);
+          return false;
+        }
+      });
+    },
   };
 }

src/features/dsp408/types.ts

@@ -183,9 +183,16 @@ export type DeviceFlags = {
   is_locked: boolean;
 };
 
+export enum InputType {
+  Analog = 'Analog',
+  PinkNoise = 'PinkNoise',
+  WhiteNoise = 'WhiteNoise',
+  SineWave = 'SineWave',
+}
+
 export type InputSource = {
-  type: string;
+  type: InputType;
-  frequency: string;
+  frequency: DiscreteFrequency;
 };
 
 export type InputChannelState = {
@@ -236,15 +243,23 @@ export type DSPState = {
   flags: DeviceFlags;
   presets: PresetBank;
   current_config: DSPConfigState;
+  connection: ConnectionStatus,
 };
 
-export type DSPMode = 'demo' | 'disconnected' | 'connected';
+export enum ConnectionStatus {
+  Connected = 'Connected',
+  Disconnected = 'Disconnected',
+}
+
+export enum DSPMode {
+    Demo = 'Demo',
+    Normal = 'Normal',
+}
 
 export type DSP408Snapshot = {
   state: DSPState;
   input_meters: DSP408InputMeters;
   output_meters: DSP408OutputMeters;
-  mode: DSPMode;
 };
 
 export interface Meter {

src/features/dsp408/utils/graph/peq.ts

@@ -139,16 +139,14 @@ function peqBandResponseDb(
 /** Sum of all bands' contributions at a given frequency. */
 function peqTotalCurveDb(
   freq: number,
-  bands: Record<PEQBand, PEQ>,
+  bands: Partial<Record<PEQBand, PEQ>>,
   sampleRate: number = DEFAULT_SAMPLE_RATE
 ): number {
-  let sum = 0;
+  return Object.values(bands).reduce(
-
+    (sum, band) =>
-  for (const band of Object.values(PEQBand)) {
+      band ? sum + peqBandResponseDb(freq, band, sampleRate) : sum,
-    sum += peqBandResponseDb(freq, bands[band], sampleRate);
+    0
-  }
+  );
-
-  return sum;
 }
 
 /**
@@ -307,16 +305,14 @@ function peqBandPhaseDeg(
 
 function peqTotalPhaseDeg(
   freq: number,
-  bands: Record<PEQBand, PEQ>,
+  bands: Partial<Record<PEQBand, PEQ>>,
   sampleRate: number = DEFAULT_SAMPLE_RATE
 ): number {
-  let sum = 0;
+  return Object.values(bands).reduce(
-
+    (sum, band) =>
-  for (const band of Object.values(PEQBand)) {
+      band ? sum + peqBandPhaseDeg(freq, band, sampleRate) : sum,
-    sum += peqBandPhaseDeg(freq, bands[band], sampleRate);
+    0
-  }
+  );
-
-  return sum;
 }
 
 export function getPeqPhasePoints({

src/pages/AddDspPage/AddDspPage.css

@@ -155,6 +155,11 @@
   height: var(--card-control-height);
 }
 
+.add-dsp-form__selector {
+  color: var(--text-primary);
+  height: 100%;
+}
+
 .add-dsp-form__field .choice-stepper__input {
   border: none;
   background: transparent;

src/pages/AddDspPage/AddDspPage.tsx

@@ -107,7 +107,7 @@ function AddDSPForm({
         <div className="add-dsp-form__field">
           <label htmlFor="f-type">Model</label>
           <ChoiceSelect
-            className=""
+            className="add-dsp-form__selector"
             id="f-type"
             value={form.type}
             options={DSP_TYPES}

src/types.ts

@@ -3,10 +3,9 @@ import {
   DSPMode,
   DSP408OutputMeters,
   DSP408InputMeters,
+  ConnectionStatus,
 } from './features/dsp408/types';
 
-export type DSPStatus = 'connected' | 'connecting' | 'disconnected';
-
 export type NotificationType = 'success' | 'error' | 'warning';
 export type Notification = {
   id: number;
@@ -38,11 +37,16 @@ interface DSPBase {
   deviceId: number;
   mode: DSPMode;
 
-  status: DSPStatus;
+  passwordRequired?: boolean;
-
+  isConnecting: boolean;
   pollingPaused: boolean;
 }
 
+export function isConnected(dsp: DSP): boolean {
+  return dsp.type === 'DSP408'
+    && dsp.state.connection === ConnectionStatus.Connected;
+}
+
 export type DSP408 = DSPBase & {
   type: 'DSP408';
   state: DSP408State;
@@ -52,8 +56,6 @@ export type DSP408 = DSPBase & {
 
 export type DSP204 = DSPBase & {
   type: 'DSP204';
-  state: null;
-  meters: null;
 };
 
 export type DSP = DSP408 | DSP204;