convert an AudioBuffer to .wav format
npm install audiobuffer-to-wav
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.
``sh`
npm install audiobuffer-to-wav --save
`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 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.
#### 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.
MIT, see LICENSE.md for details.