pcm-util [](http://github.com/badges/stability-badges) [](https://travis-ci.org/audiojs/pcm-util) [](https://greenkeeper.io/)

June 17, 2017 · View on GitHub

Utils to tamper with PCM formats/buffers. In particular, converting Buffer to AudioBuffer, ArrayBuffer to AudioBuffer, AudioBuffer to ArrayBuffer or AudioBuffer to Buffer.

var pcm = require('pcm-util')

`pcm.defaults`

Default PCM format to use for any operations

pcm.defaults === {
	channels: 2,
	sampleRate: 44100,
	interleaved: true,
	float: false,
	signed: true,
	bitDepth: 16,
	byteOrder: 'LE',
	max: 32767,
	min: -32768,
	samplesPerFrame: 1024,
	id: 'S_16_LE_2_44100_I'
}

`pcm.normalize(format)`

Normalize passed format: ensure all the properties are present and do not contradict.

`pcm.format(audioBuffer)`

Retrieve format-related properties from audio buffer, return not normalized format.

`pcm.equal(a, b)`

Compare whether two formats are equal to each other.

`pcm.toAudioBuffer(buffer, format)`

Convert buffer/arrayBuffer with the format to audio buffer.

`pcm.toArrayBuffer(audioBuffer, format)`

Convert audio buffer to array buffer with the format.

`pcm.convert(buffer, fromFormat, toFormat)`

Convert array buffer from one format to another.

audio-buffer — audio buffer polyfill.
audio-buffer-utils — utils for audio buffers.