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stop maintaine as a public package

node-webrtcvad

A nodejs interface to the WebRTC Voice Activity Detector(VAD).

A VAD classifies a piece of audio data as being voiced or unvoiced. It can be useful for telephony and speech recognition.

The VAD that Google developed for the WebRTC project is reportedly one of the best available, being fast, modern and free.

0. Install

npm install node-webrtcvad

1. Import

import {WaveVad} from 'node-webrtcvad';

2. Set aggressiveness mode while create the instance.

between 0 and 4. 0 is the least aggressive about filtering out non-speech, 4 is the most aggressive. (added in 0.1.0)

const vad = new WaveVad(3);

3. Get the result.

const segments = await vad.getSegmentsFromFile("leak-test.wav", 30, 300);

output should be like this (changed in 0.1.3)

{
    frames: [1,0,0,0,1,1,1...],
    windows: [
        { start: 510, end: 4260 },
        { start: 4290, end: 7860 }
        ...
    ]
    segments: [
        { start: 510, end: 4260 },
        { start: 4290, end: 7860 }
        ...
    ]
}

each number in array "frames" represent 0: not speech, 1: speech.

each {start, end} in array "windows" represent the speech windows after triggerIn and triggerOut applied.

each {start, end} in array "segments" represent the segments which after leadin and minInterval applied.

4. CLI supported

You can install with -g to have a command to save vsd result to a text file

npm install -g node-webrtcvad

node-webrtcvad <wav-file.wav> <aggresiveness>

and the result of vad (a string of json) will be saved as a text file.