Gist for Converting an Array into a 32bit Floating Point Buffer for WebRTC Voice Activity Detection (javascript, node-vad)

gistfile1.txt

// Javascript
// Using node-vad

floatingPointArray = [...];

let buf = Buffer.allocUnsafe(4 * floatingPointArray.length);
for (var k = 0 ; k < floatingPointArray.length ; k++) {
    buf.writeFloatLE(floatingPointArray[k], k * 4);
}

let decision = await vad.processAudio(buf, 16000); // 16000 is the sampling rate

switch (decision) {
    case VAD.Event.ERROR:
        console.log("ERROR");
        break;
    case VAD.Event.NOISE:
        console.log("NOISE");
        break;
    case VAD.Event.SILENCE:
        console.log("SILENCE");
        break;
    case VAD.Event.VOICE:
        console.log("VOICE");
        break;
}