audioEncoder

Encode audioBuffer to wave or mp3 from the browser, using an unified API


USAGE:

Import the library as script:
(Copy the dist/audioEncoder.js file in your project)
``html

`

Or require as a module:
`js
var audioEncoder = require('audio-encoder');
`

Encode an AudioBuffer instance:
`js
audioEncoder(audioBuffer, encoding, onProgress, onComplete);
`

encoding is either:
- 'WAV' or 0 or null -> will encode to a wave file
- any valid mp3 bitrate: 320, 256, 192, 128, 96, 64, 56, 48, 40, 32

onComplete gets called with a Blob instance as result.

$3

| bitrate | sample rate | force to mono
| ------------------ | ------------- | -------------
| 96 kBps and higher | 44.1 kHz | false
| 64 kBps | 44.1 kHz | true
| 56 kBps | 32 kHz | true
| 48 kBps | 32 kHz | true
| 40 kBps | 24 kHz | true
| 32 kBps | 22 kHz | true

Example

`js
const audioEncoder = require('audio-encoder');
const fileSaver = require('file-saver');

// create audioBuffer
const audioContext = new AudioContext();
const length = 44100; // one second @ 44.1KHz
const audioBuffer = audioContext.createBuffer(1, length, 44100);
const channelData = audioBuffer.getChannelData(0);

// fill some audio
for (let i = 0; i < length; i++) {
channelData[i] = Math.sin(i * 0.03);
}

// convert as mp3 and save file using file-saver
audioEncoder(audioBuffer, 128, null, function onComplete(blob) {
fileSaver.saveAs(blob, 'sound.mp3');
});
``