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Promote to production: voice-to-text dtype fix #73

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Merged
slaveofcode merged 2 commits into from
Aug 1, 2026
Merged

Promote to production: voice-to-text dtype fix #73

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3fc32ed
fix(voice-to-text): use per-module dtype so the Whisper session loads
Aug 1, 2026
51d577d
Merge pull request #72 from slaveofcode/fix/voice-to-text-dtype
slaveofcode Aug 1, 2026
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7 changes: 5 additions & 2 deletions src/tools/media/stt.engine.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -45,8 +45,11 @@ export async function createTranscriber(

const pipe = await pipeline('automatic-speech-recognition', model, {
device: backend,
// Quantize on WASM to shrink the download; full precision on WebGPU for quality.
dtype: backend === 'wasm' ? 'q8' : 'fp32',
// Whisper is an encoder-decoder model. Per-module dtype is required: the
// quantized (q8/q4) decoder — which holds embed_tokens — trips an ONNX Runtime
// "MatMulNBits: Missing required scale" error, so load the decoder full
// precision. The encoder can stay quantized to keep the download smaller.
dtype: { encoder_model: backend === 'webgpu' ? 'fp32' : 'q8', decoder_model_merged: 'fp32' },
progress_callback: (p: { status?: string; progress?: number }) => {
if (onProgress && p?.status === 'progress' && typeof p.progress === 'number') {
onProgress(Math.min(1, Math.max(0, p.progress / 100)));
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