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feat: add trimSilence option to control sox silence trimming #8

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feat: add trimSilence option to control sox silence trimming #8

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,7 @@ For unauthenticated local endpoints (e.g. Ollama):
- `chatTemplateKwargs` _(optional)_ - extra keyword arguments passed to the model's chat template (e.g. `{"enable_thinking": false}` for Qwen models to disable chain-of-thought)
- `retries` _(optional)_ - number of retry attempts for transient LLM failures
- `tmpDir` _(optional)_ - directory used for the temporary STT recording file (default `/tmp`)
- `trimSilence` _(optional)_ - whether to remove leading silence from recordings (default `true`). Set to `false` if your recordings are missing the first word or syllable

### Logging

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7 changes: 4 additions & 3 deletions lib/stt.js
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Expand Up @@ -115,7 +115,7 @@ function forceKillSox(logger) {
} catch {}
}

function startRecording(kv, toast, logger) {
function startRecording(kv, toast, logger, trimSilence = true) {
if (soxProc) {
logger?.log("STT", "Start recording skipped: sox already running", "debug");
return;
Expand All @@ -132,9 +132,10 @@ function startRecording(kv, toast, logger) {
const inputArgs = mic ? ["-t", "coreaudio", mic] : ["-d"];
logger?.log("STT", `Starting recording mic=${mic || "system default"}`, "debug");

const silenceArgs = trimSilence ? ["silence", "1", "0.1", "1%"] : [];
soxProc = spawn(
"sox",
[...inputArgs, "-r", "16000", "-c", "1", "-b", "16", wavFile, "silence", "1", "0.1", "1%"],
[...inputArgs, "-r", "16000", "-c", "1", "-b", "16", wavFile, ...silenceArgs],
{
stdio: ["ignore", "ignore", "pipe"],
detached: false,
Expand Down Expand Up @@ -517,7 +518,7 @@ export function registerSTT(api, kv, complete, prompts, opts, logger) {
toast("Stopping, transcribing...");
doTranscribePipeline(kv, complete, client, toast, systemPrompt, false, logger);
} else {
startRecording(kv, toast, logger);
startRecording(kv, toast, logger, opts.trimSilence);
if (recording) toast("Recording... press again to transcribe");
}
},
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