Skip to content
convert an AudioBuffer to .wav format
JavaScript
Branch: master
Clone or download
Latest commit 2272eb0 Dec 14, 2015
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
demo bam! Dec 14, 2015
.gitignore bam! Dec 14, 2015
.npmignore bam! Dec 14, 2015
LICENSE.md bam! Dec 14, 2015
README.md bam! Dec 14, 2015
index.js bam! Dec 14, 2015
package.json bam! Dec 14, 2015

README.md

audiobuffer-to-wav

stable

Encodes the contents of an 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.

PRs welcome.

Install

npm install audiobuffer-to-wav --save

Example

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 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, i.e. an easy way to convert MP3/OGG/etc to WAV.

Usage

NPM

arrayBuffer = encodeWAV(audioBuffer, [opt])

Encodes the 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 for details.

You can’t perform that action at this time.