VAD: Silero v5 (vad-web) statt RMS-Eigenbau — Turn-Ende 900 -> 450 ms (Review P1-7)

- useVAD.ts: MicVAD (neuronale Sprach- statt Pegel-Erkennung), redemptionMs 450, preSpeechPad 320 ms, WAV direkt aus Float32 (kein webm/Opus-Umweg mehr zur Box) - boxStt.ts: Dateiname passend zum Blob-Typ (rec.wav | rec.webm) - Assets self-hosted unter /vad/ via scripts/copy-vad-assets.mjs (npm postinstall), offlinefaehig - Verifiziert: tsc + Build sauber, App startet, Assets werden ausgeliefert (Mikro-Test: User) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-02 10:49:36 +02:00
parent 403961da51
commit 45fb61000a
7 changed files with 230 additions and 90 deletions
@@ -4,3 +4,4 @@ dist/
 *.log
 # Avatar-VRM ist gross + Lizenz/Redistribution -> nicht committen (lokal/Box vorhalten)
 src/renderer/public/avatar.vrm
+src/renderer/public/vad/
@@ -12,6 +12,9 @@ export default defineConfig({
  renderer: {
    root: resolve(__dirname, "src/renderer"),
    build: { rollupOptions: { input: { index: resolve(__dirname, "src/renderer/index.html") } } },
+    // Silero-VAD-Assets (Worklet + ONNX + onnxruntime-WASM) liegen self-hosted in
+    // src/renderer/public/vad/ (scripts/copy-vad-assets.mjs, läuft via npm postinstall) —
+    // Pfade = baseAssetPath/onnxWASMBasePath in useVAD.ts.
    plugins: [react()],
  },
 })
@@ -7,11 +7,13 @@
    "": {
      "name": "lucy-desktop",
      "version": "0.1.0",
+      "hasInstallScript": true,
      "dependencies": {
        "@pixiv/three-vrm": "^3.4.0",
        "@pixiv/three-vrm-animation": "^3.5.4",
        "@react-three/drei": "^9.114.0",
        "@react-three/fiber": "^8.17.10",
+        "@ricky0123/vad-web": "^0.0.30",
        "react": "^18.3.1",
        "react-dom": "^18.3.1",
        "react-markdown": "^9.1.0",
@@ -1027,6 +1029,63 @@
        "@pixiv/types-vrmc-vrm-1.0": "3.5.4"
      }
    },
+    "node_modules/@protobufjs/aspromise": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/aspromise/-/aspromise-1.1.2.tgz",
+      "integrity": "sha512-j+gKExEuLmKwvz3OgROXtrJ2UG2x8Ch2YZUxahh+s1F2HZ+wAceUNLkvy6zKCPVRkU++ZWQrdxsUeQXmcg4uoQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/base64": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/base64/-/base64-1.1.2.tgz",
+      "integrity": "sha512-AZkcAA5vnN/v4PDqKyMR5lx7hZttPDgClv83E//FMNhR2TMcLUhfRUBHCmSl0oi9zMgDDqRUJkSxO3wm85+XLg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/codegen": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/@protobufjs/codegen/-/codegen-2.0.5.tgz",
+      "integrity": "sha512-zgXFLzW3Ap33e6d0Wlj4MGIm6Ce8O89n/apUaGNB/jx+hw+ruWEp7EwGUshdLKVRCxZW12fp9r40E1mQrf/34g==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/eventemitter": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@protobufjs/eventemitter/-/eventemitter-1.1.1.tgz",
+      "integrity": "sha512-vW1GmwMZNnL+gMRaovlh9yZX74kc+TTU3FObkkurpMaRtBfLP3ldjS9KQWlwZgraRE0+dheEEoAxdzcJQ8eXZg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/fetch": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@protobufjs/fetch/-/fetch-1.1.1.tgz",
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+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.1"
+      }
+    },
+    "node_modules/@protobufjs/float": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/float/-/float-1.0.2.tgz",
+      "integrity": "sha512-Ddb+kVXlXst9d+R9PfTIxh1EdNkgoRe5tOX6t01f1lYWOvJnSPDBlG241QLzcyPdoNTsblLUdujGSE4RzrTZGQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/path": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/path/-/path-1.1.2.tgz",
+      "integrity": "sha512-6JOcJ5Tm08dOHAbdR3GrvP+yUUfkjG5ePsHYczMFLq3ZmMkAD98cDgcT2iA1lJ9NVwFd4tH/iSSoe44YWkltEA==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/pool": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/pool/-/pool-1.1.0.tgz",
+      "integrity": "sha512-0kELaGSIDBKvcgS4zkjz1PeddatrjYcmMWOlAuAPwAeccUrPHdUqo/J6LiymHHEiJT5NrF1UVwxY14f+fy4WQw==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/utf8": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.1.tgz",
+      "integrity": "sha512-oOAWABowe8EAbMyWKM0tYDKi8Yaox52D+HWZhAIJqQXbqe0xI/GV7FhLWqlEKreMkfDjshR5FKgi3mnle0h6Eg==",
+      "license": "BSD-3-Clause"
+    },
    "node_modules/@react-spring/animated": {
      "version": "9.7.5",
      "resolved": "https://registry.npmjs.org/@react-spring/animated/-/animated-9.7.5.tgz",
@@ -1207,6 +1266,15 @@
        }
      }
    },
+    "node_modules/@ricky0123/vad-web": {
+      "version": "0.0.30",
+      "resolved": "https://registry.npmjs.org/@ricky0123/vad-web/-/vad-web-0.0.30.tgz",
+      "integrity": "sha512-cJyYrh4YeeUBJcbR9Bic/bFDyB9qBkAepvpuWM3vLxnAi7bC3VHzf51UeNdT+OtY4D7MLAgV8iJMc4z41ZnaWg==",
+      "license": "ISC",
+      "dependencies": {
+        "onnxruntime-web": "^1.17.0"
+      }
+    },
    "node_modules/@rolldown/pluginutils": {
      "version": "1.0.0-beta.27",
      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
@@ -1768,7 +1836,6 @@
      "version": "20.19.43",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.43.tgz",
      "integrity": "sha512-6oYBAi5ikg4Pl+kGsoYtawUMBT2zZMCvPNF7pVLnHZfd1zf38DRiWn/gT01RYCdUqkv7Fhr+C9ot4/tb+2sVvA==",
-      "dev": true,
      "license": "MIT",
      "dependencies": {
        "undici-types": "~6.21.0"
@@ -2630,6 +2697,12 @@
      "integrity": "sha512-tbZNuJrLwGUp3zshBtdy4W+ORxZuIh8a5ilyIEQDC5rY1f3U20JMry0Ll3WBzU58EZKsEuJFXhb5gwv8CsPvgA==",
      "license": "MIT"
    },
+    "node_modules/flatbuffers": {
+      "version": "25.9.23",
+      "resolved": "https://registry.npmjs.org/flatbuffers/-/flatbuffers-25.9.23.tgz",
+      "integrity": "sha512-MI1qs7Lo4Syw0EOzUl0xjs2lsoeqFku44KpngfIduHBYvzm8h2+7K8YMQh1JtVVVrUvhLpNwqVi4DERegUJhPQ==",
+      "license": "Apache-2.0"
+    },
    "node_modules/fs-extra": {
      "version": "8.1.0",
      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
@@ -2790,6 +2863,12 @@
      "dev": true,
      "license": "ISC"
    },
+    "node_modules/guid-typescript": {
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/guid-typescript/-/guid-typescript-1.0.9.tgz",
+      "integrity": "sha512-Y8T4vYhEfwJOTbouREvG+3XDsjr8E3kIr7uf+JZ0BYloFsttiHU0WfvANVsR7TxNUJa/WpCnw/Ino/p+DeBhBQ==",
+      "license": "ISC"
+    },
    "node_modules/has-property-descriptors": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz",
@@ -3078,6 +3157,12 @@
        "immediate": "~3.0.5"
      }
    },
+    "node_modules/long": {
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/long/-/long-5.3.2.tgz",
+      "integrity": "sha512-mNAgZ1GmyNhD7AuqnTG3/VQ26o760+ZYBPKjPvugO8+nLbYfX6TVpJPseBvopbdY+qpZ/lKUnmEc1LeZYS3QAA==",
+      "license": "Apache-2.0"
+    },
    "node_modules/longest-streak": {
      "version": "3.1.0",
      "resolved": "https://registry.npmjs.org/longest-streak/-/longest-streak-3.1.0.tgz",
@@ -4112,6 +4197,26 @@
        "wrappy": "1"
      }
    },
+    "node_modules/onnxruntime-common": {
+      "version": "1.27.0",
+      "resolved": "https://registry.npmjs.org/onnxruntime-common/-/onnxruntime-common-1.27.0.tgz",
+      "integrity": "sha512-3KxL5wIVqa8Ex08jxSzncm9CMgw8CjOFyOQ7SxvG9o0cVLlhTNKXyIQuTbtX4tGPJEf73OER2xrjt4HJSBL4ow==",
+      "license": "MIT"
+    },
+    "node_modules/onnxruntime-web": {
+      "version": "1.27.0",
+      "resolved": "https://registry.npmjs.org/onnxruntime-web/-/onnxruntime-web-1.27.0.tgz",
+      "integrity": "sha512-ogDLsqIozHZwifPuN37OproAo0byX6t43/bP8GzeZWBWD6MOGExswFAx3up4NS/vvWBOg2u2PXomDt3rMmdQSg==",
+      "license": "MIT",
+      "dependencies": {
+        "flatbuffers": "^25.1.24",
+        "guid-typescript": "^1.0.9",
+        "long": "^5.2.3",
+        "onnxruntime-common": "1.27.0",
+        "platform": "^1.3.6",
+        "protobufjs": "^7.2.4"
+      }
+    },
    "node_modules/p-cancelable": {
      "version": "2.1.1",
      "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-2.1.1.tgz",
@@ -4183,6 +4288,12 @@
        "url": "https://github.com/sponsors/jonschlinkert"
      }
    },
+    "node_modules/platform": {
+      "version": "1.3.6",
+      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.6.tgz",
+      "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
+      "license": "MIT"
+    },
    "node_modules/postcss": {
      "version": "8.5.15",
      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.15.tgz",
@@ -4259,6 +4370,29 @@
        "url": "https://github.com/sponsors/wooorm"
      }
    },
+    "node_modules/protobufjs": {
+      "version": "7.6.4",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.6.4.tgz",
+      "integrity": "sha512-RJJPTTpvFfHcWLkIa2JFWK4XvtSzS0yEWDmunqHXli1h3JlkbcQZXDZdcWxv+JK3Xsl5/UFDPZ0iGm7DAengYw==",
+      "hasInstallScript": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.2",
+        "@protobufjs/base64": "^1.1.2",
+        "@protobufjs/codegen": "^2.0.5",
+        "@protobufjs/eventemitter": "^1.1.1",
+        "@protobufjs/fetch": "^1.1.1",
+        "@protobufjs/float": "^1.0.2",
+        "@protobufjs/path": "^1.1.2",
+        "@protobufjs/pool": "^1.1.0",
+        "@protobufjs/utf8": "^1.1.1",
+        "@types/node": ">=13.7.0",
+        "long": "^5.3.2"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
    "node_modules/pump": {
      "version": "3.0.4",
      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.4.tgz",
@@ -4910,7 +5044,6 @@
      "version": "6.21.0",
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
-      "dev": true,
      "license": "MIT"
    },
    "node_modules/unified": {
@@ -7,13 +7,15 @@
  "scripts": {
    "dev": "electron-vite dev",
    "build": "electron-vite build",
-    "preview": "electron-vite preview"
+    "preview": "electron-vite preview",
+    "postinstall": "node scripts/copy-vad-assets.mjs"
  },
  "dependencies": {
    "@pixiv/three-vrm": "^3.4.0",
    "@pixiv/three-vrm-animation": "^3.5.4",
    "@react-three/drei": "^9.114.0",
    "@react-three/fiber": "^8.17.10",
+    "@ricky0123/vad-web": "^0.0.30",
    "react": "^18.3.1",
    "react-dom": "^18.3.1",
    "react-markdown": "^9.1.0",
@@ -0,0 +1,23 @@
+// Kopiert die Silero-VAD-Assets (Worklet + ONNX-Modell + onnxruntime-WASM) nach public/vad/,
+// damit die App sie self-hosted lädt (offlinefähig, kein CDN). Läuft via npm postinstall.
+// public/ wird von Vite in Dev UND Build verbatim ausgeliefert -> ein Pfad für beide Welten.
+import { copyFileSync, mkdirSync, readdirSync } from "node:fs"
+import { dirname, join } from "node:path"
+import { fileURLToPath } from "node:url"
+
+const root = join(dirname(fileURLToPath(import.meta.url)), "..")
+const dest = join(root, "src", "renderer", "public", "vad")
+mkdirSync(dest, { recursive: true })
+
+const jobs = [
+  [join(root, "node_modules", "@ricky0123", "vad-web", "dist"), (f) => f === "vad.worklet.bundle.min.js" || f.endsWith(".onnx")],
+  [join(root, "node_modules", "onnxruntime-web", "dist"), (f) => f.endsWith(".wasm") || f.endsWith(".mjs")],
+]
+
+let n = 0
+for (const [src, match] of jobs) {
+  for (const f of readdirSync(src)) {
+    if (match(f)) { copyFileSync(join(src, f), join(dest, f)); n++ }
+  }
+}
+console.log(`[vad-assets] ${n} Dateien nach ${dest} kopiert.`)
@@ -1,8 +1,12 @@
 import { useEffect, useRef } from "react"
+import { MicVAD } from "@ricky0123/vad-web"

-// Freisprech-VAD (Voice Activity Detection): lauscht dauerhaft am Mikro, erkennt Sprech-Beginn/-Ende
-// per Energie und liefert komplette Äußerungen als Blob. RÜCKKOPPLUNGS-SCHUTZ: `paused` (Lucy denkt/spricht)
-// stoppt die Erkennung -> Lucys eigene Stimme triggert das Mikro nicht; + echoCancellation + Abkling-Sperre.
+// Freisprech-VAD: lauscht dauerhaft am Mikro und liefert komplette Äußerungen als Blob.
+// Seit Review P1-7 (2026-07-02) Silero VAD v5 (neuronal, via vad-web/onnxruntime-wasm) statt
+// des RMS-Eigenbaus: erkennt Sprache statt Lautstärke (robust gegen Tastatur/Lüfter) und
+// erlaubt dadurch ein kürzeres Turn-Ende (450 ms statt 900 ms Stille) ohne Abschneiden.
+// RÜCKKOPPLUNGS-SCHUTZ bleibt: `paused` (Lucy denkt/spricht) verwirft laufende Erkennung,
+// + echoCancellation + Abkling-Sperre nach Lucys Antwort.

 interface VADOptions {
  enabled: boolean       // VAD-Modus an?
@@ -11,11 +15,28 @@ interface VADOptions {
  onListening?: (active: boolean) => void  // UI: gerade Sprache am Aufnehmen?
 }

-// Erkennung per ZEIT-DOMÄNEN-RMS mit ADAPTIVEM Rausch-Pegel (kalibriert sich aufs Mikro) — robuster
-// als feste Frequenz-Schwellen. Schwellen werden relativ zum gemessenen Rauschen berechnet.
-const START_FRAMES = 3      // so viele laute Frames in Folge -> Start (gegen Klick-Fehlstarts)
-const SILENCE_MS = 900      // so lange Stille -> Äußerung zu Ende
-const COOLDOWN_MS = 450     // nach Pause-Ende kurz taub (Echo/Lautsprecher abklingen lassen)
+const REDEMPTION_MS = 450      // so lange Stille -> Äußerung zu Ende (war 900 ms beim RMS-VAD)
+const PRE_SPEECH_PAD_MS = 320  // Vorlauf mitschneiden (erster Wortanfang nicht abschneiden)
+const MIN_SPEECH_MS = 160      // kürzer = Klick/Räuspern -> verwerfen
+const COOLDOWN_MS = 450        // nach Lucys Antwort kurz taub (Echo/Lautsprecher abklingen lassen)
+
+// Float32-Samples (16 kHz mono) -> WAV-Blob (PCM16). Ersetzt den MediaRecorder-webm-Umweg:
+// die Box muss kein Opus mehr dekodieren, Parakeet/Whisper bekommen direkt sauberes WAV.
+function toWavBlob(samples: Float32Array, sampleRate = 16000): Blob {
+  const buf = new ArrayBuffer(44 + samples.length * 2)
+  const v = new DataView(buf)
+  const writeStr = (off: number, s: string) => { for (let i = 0; i < s.length; i++) v.setUint8(off + i, s.charCodeAt(i)) }
+  writeStr(0, "RIFF"); v.setUint32(4, 36 + samples.length * 2, true); writeStr(8, "WAVE")
+  writeStr(12, "fmt "); v.setUint32(16, 16, true); v.setUint16(20, 1, true); v.setUint16(22, 1, true)
+  v.setUint32(24, sampleRate, true); v.setUint32(28, sampleRate * 2, true); v.setUint16(32, 2, true); v.setUint16(34, 16, true)
+  writeStr(36, "data"); v.setUint32(40, samples.length * 2, true)
+  let off = 44
+  for (let i = 0; i < samples.length; i++, off += 2) {
+    const s = Math.max(-1, Math.min(1, samples[i]))
+    v.setInt16(off, s < 0 ? s * 0x8000 : s * 0x7fff, true)
+  }
+  return new Blob([buf], { type: "audio/wav" })
+}

 export function useVAD({ enabled, paused, onUtterance, onListening }: VADOptions) {
  const pausedRef = useRef(paused); pausedRef.current = paused
@@ -29,92 +50,47 @@ export function useVAD({ enabled, paused, onUtterance, onListening }: VADOptions
  useEffect(() => {
    if (!enabled) return
    let cancelled = false
-    let stream: MediaStream | null = null
-    let ctx: AudioContext | null = null
-    let raf = 0
-    let rec: MediaRecorder | null = null
-    let chunks: Blob[] = []
-    let speaking = false
-    let silenceStart = 0
-    let voiceFrames = 0
-
-    const setListening = (v: boolean) => onLst.current?.(v)
+    let vad: Awaited<ReturnType<typeof MicVAD.new>> | null = null

    ;(async () => {
      try {
-        stream = await navigator.mediaDevices.getUserMedia({
-          audio: { echoCancellation: true, noiseSuppression: true, autoGainControl: true },
+        vad = await MicVAD.new({
+          model: "v5",
+          // Assets self-hosted (electron.vite.config.ts kopiert sie nach /vad/) — offlinefähig.
+          baseAssetPath: "/vad/",
+          onnxWASMBasePath: "/vad/",
+          positiveSpeechThreshold: 0.5,
+          negativeSpeechThreshold: 0.35,
+          redemptionMs: REDEMPTION_MS,
+          preSpeechPadMs: PRE_SPEECH_PAD_MS,
+          minSpeechMs: MIN_SPEECH_MS,
+          getStream: () => navigator.mediaDevices.getUserMedia({
+            audio: { echoCancellation: true, noiseSuppression: true, autoGainControl: true },
+          }),
+          onSpeechStart: () => {
+            if (pausedRef.current || performance.now() < resumeAt.current) return
+            onLst.current?.(true)
+          },
+          onSpeechEnd: (audio: Float32Array) => {
+            onLst.current?.(false)
+            // Während Lucy denkt/spricht (oder direkt danach) erkannte Sprache = ihr eigenes
+            // Echo bzw. Nachhall -> verwerfen statt transkribieren.
+            if (cancelled || pausedRef.current || performance.now() < resumeAt.current) return
+            if (audio.length < MIN_SPEECH_MS * 16) return   // 16 Samples/ms @16 kHz
+            onUtt.current(toWavBlob(audio))
+          },
+          onVADMisfire: () => onLst.current?.(false),
        })
+        if (cancelled) { vad.destroy(); return }
+        vad.start()
      } catch (e) {
-        console.error("VAD: Mikrofon-Zugriff verweigert", e); return
+        console.error("VAD: Silero-Init fehlgeschlagen", e)
      }
-      if (cancelled) { stream.getTracks().forEach((t) => t.stop()); return }
-
-      const Ctor = window.AudioContext || (window as any).webkitAudioContext
-      ctx = new Ctor()
-      try { await ctx.resume() } catch { /* */ }   // WICHTIG: sonst bleibt der Context 'suspended' -> nur Nullen
-      const srcNode = ctx.createMediaStreamSource(stream)
-      const analyser = ctx.createAnalyser()
-      analyser.fftSize = 1024
-      srcNode.connect(analyser)
-      const wave = new Uint8Array(analyser.fftSize)
-      let noiseFloor = 0.015   // adaptiver Rausch-Pegel (kalibriert sich auf das Mikro)
-      const mime = MediaRecorder.isTypeSupported("audio/webm;codecs=opus") ? "audio/webm;codecs=opus" : "audio/webm"
-
-      const startRec = () => {
-        chunks = []
-        rec = new MediaRecorder(stream!, { mimeType: mime })
-        rec.ondataavailable = (e) => { if (e.data.size) chunks.push(e.data) }
-        rec.onstop = () => {
-          const blob = new Blob(chunks, { type: mime })
-          if (!cancelled && blob.size > 2400) onUtt.current(blob)   // Mini-Blobs (Klicks) verwerfen
-        }
-        rec.start()
-        setListening(true)
-      }
-      const stopRec = (emit: boolean) => {
-        if (rec && rec.state !== "inactive") {
-          if (!emit) rec.onstop = null
-          rec.stop()
-        }
-        rec = null
-        setListening(false)
-      }
-
-      const tick = () => {
-        if (cancelled) return
-        analyser.getByteTimeDomainData(wave)
-        let sq = 0
-        for (let i = 0; i < wave.length; i++) { const v = (wave[i] - 128) / 128; sq += v * v }
-        const level = Math.sqrt(sq / wave.length)   // RMS-Pegel 0..1
-        const now = performance.now()
-        // Rausch-Pegel langsam an leise Phasen angleichen (nur wenn nicht geredet wird)
-        if (!speaking) noiseFloor += (Math.min(level, noiseFloor * 1.6 + 0.004) - noiseFloor) * 0.05
-        const startTh = Math.max(0.02, noiseFloor * 2.8)   // Sprache: deutlich über dem Rauschen
-        const stopTh = Math.max(0.012, noiseFloor * 1.7)   // Stille: nahe am Rauschen
-
-        if (pausedRef.current || now < resumeAt.current) {
-          if (speaking) { speaking = false; voiceFrames = 0; silenceStart = 0; stopRec(false) }  // verwerfen
-        } else if (!speaking) {
-          if (level > startTh) { voiceFrames++; if (voiceFrames >= START_FRAMES) { speaking = true; silenceStart = 0; startRec() } }
-          else voiceFrames = 0
-        } else {
-          if (level < stopTh) {
-            if (!silenceStart) silenceStart = now
-            else if (now - silenceStart > SILENCE_MS) { speaking = false; silenceStart = 0; stopRec(true) }
-          } else silenceStart = 0
-        }
-        raf = requestAnimationFrame(tick)
-      }
-      tick()
    })()

    return () => {
      cancelled = true
-      cancelAnimationFrame(raf)
-      try { if (rec && rec.state !== "inactive") { rec.onstop = null; rec.stop() } } catch { /* */ }
-      stream?.getTracks().forEach((t) => t.stop())
-      try { ctx?.close() } catch { /* */ }
+      try { vad?.destroy() } catch { /* */ }
      onLst.current?.(false)
    }
  }, [enabled])
@@ -1,14 +1,16 @@
-// Box-STT-Adapter — Spracherkennung läuft auf der Box (MC2 /api/voice/stt -> faster-whisper).
+// Box-STT-Adapter — Spracherkennung läuft auf der Box (MC2 /api/voice/stt -> Parakeet,
+// whisper als Fallback). Der Dateiname muss zum Blob-Typ passen: der Sidecar wählt die
+// Dekodierung nach Suffix (Silero-VAD liefert WAV, Push-to-Talk weiterhin webm/opus).
 import { BOX_URL } from "../../config"
 import type { SttEngine } from "../types"

 export class BoxSttEngine implements SttEngine {
-  readonly id = "box-whisper"
+  readonly id = "box-stt"
  constructor(private readonly baseUrl: string = BOX_URL) {}

  async transcribe(audio: Blob): Promise<string> {
    const fd = new FormData()
-    fd.append("audio", audio, "rec.webm")
+    fd.append("audio", audio, audio.type.includes("wav") ? "rec.wav" : "rec.webm")
    const r = await fetch(`${this.baseUrl}/api/voice/stt`, { method: "POST", body: fd })
    if (!r.ok) throw new Error(`STT ${r.status}`)
    return (await r.json()).text?.trim() || ""