Class VAD

Detects the start and end of voiced speech in a PCM audio stream.

const vad = new VAD({ energyThreshold: 0.01, silenceHoldOffMs: 300, minSpeechDurationMs: 100 });
vad.onEvent((e) => { if (e.type === VadEventType.SPEECH_START) stt.beginUtterance(); });
capture.onChunk((pcm) => vad.feed(pcm));

Index

Constructors

constructor

Methods

feed isSpeaking onEvent reset

Constructors

constructor

new VAD(config: VadConfig): VAD
Creates a new VAD instance with the given detection parameters.
Parameters
- config: VadConfig
  Energy threshold and timing settings.
Returns VAD
- Defined in apps/tutor/src/voice/VAD.ts:81

Methods

feed

feed(chunk: Float32Array): void
Processes a PCM chunk and fires VAD events if a state transition occurs.
Parameters
- chunk: Float32Array
  Float32 PCM samples in the range [-1, 1].
Returns void
- Defined in apps/tutor/src/voice/VAD.ts:90

isSpeaking

isSpeaking(): boolean
Returns true if the VAD currently considers the stream to be voiced.

Returns boolean
Active speech state.
- Defined in apps/tutor/src/voice/VAD.ts:109

onEvent

onEvent(cb: VadEventCallback): void
Registers a callback to receive VadEvent notifications. Replaces any previously registered callback.
Parameters
- cb: VadEventCallback
  Invoked synchronously when a VAD event fires.
Returns void
- Defined in apps/tutor/src/voice/VAD.ts:100

reset

reset(): void
Resets internal state (energy history and hold-off timer). Call this when starting a fresh utterance.

Returns void
- Defined in apps/tutor/src/voice/VAD.ts:117

Class VAD

Index

Constructors

Methods

Constructors

constructor

Parameters

Returns VAD

Methods

feed

Parameters

Returns void

isSpeaking

Returns boolean

onEvent

Parameters

Returns void

reset

Returns void

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