https://github.com/Experience-Monks/audiobuffer-to-wav

convert an AudioBuffer to .wav format
https://github.com/Experience-Monks/audiobuffer-to-wav

Last synced: 4 months ago
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convert an AudioBuffer to .wav format

• Host: GitHub
• URL: https://github.com/Experience-Monks/audiobuffer-to-wav
• Owner: Experience-Monks
• License: mit
• Created: 2015-12-14T16:59:50.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2019-11-10T03:25:13.000Z (about 5 years ago)
• Last Synced: 2024-08-17T11:09:24.819Z (4 months ago)
• Language: JavaScript
• Homepage:
• Size: 231 KB
• Stars: 147
• Watchers: 9
• Forks: 23
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# audiobuffer-to-wav

[![stable](http://badges.github.io/stability-badges/dist/stable.svg)](http://github.com/badges/stability-badges)

Encodes the contents of an [AudioBuffer](https://developer.mozilla.org/en-US/docs/Web/API/AudioBuffer) from the WebAudio API as WAVE. Supports 16-bit PCM and 32-bit float data.

The code for this has been adapted from the export feature of [Recorder.js](https://github.com/mattdiamond/Recorderjs).

PRs welcome.

## Install

```sh

npm install audiobuffer-to-wav --save

```

## Example

```js

var toWav = require('audiobuffer-to-wav')

var xhr = require('xhr')

var context = new AudioContext()

// request the MP3 as binary

xhr({

  uri: 'audio/track.mp3',

  responseType: 'arraybuffer'

}, function (err, body, resp) {

  if (err) throw err

  // decode the MP3 into an AudioBuffer

  audioContext.decodeAudioData(resp, function (buffer) {

    // encode AudioBuffer to WAV

    var wav = toWav(buffer)

    

    // do something with the WAV ArrayBuffer ...

  })

})

```

See [the demo](./demo/index.js) for an example of loading MP3, decoding it, and triggering a download of the encoded WAV file.

A more advanced example might be to write the file using Node and Electron or [hihat](https://www.npmjs.com/package/hihat), i.e. an easy way to convert MP3/OGG/etc to WAV.

## Usage

[![NPM](https://nodei.co/npm/audiobuffer-to-wav.png)](https://www.npmjs.com/package/audiobuffer-to-wav)

#### `arrayBuffer = encodeWAV(audioBuffer, [opt])`

Encodes the [AudioBuffer](https://developer.mozilla.org/en-US/docs/Web/API/AudioBuffer) instance as WAV, returning a new array buffer. Interleaves multi-channel data, if necessary.

By default, exports with 16-bit PCM (format: 1). You can specify `opt.float32` instead, which will write format 3 with 32-bit float data.

## License

MIT, see [LICENSE.md](http://github.com/Jam3/audiobuffer-to-wav/blob/master/LICENSE.md) for details.