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An implementation of Web Audio API's AudioBuffer for node.js. With extra-sugar for slicing, concatenating, creating, ... audiobuffers.
Install AudioBuffer
with npm
:
npm install audiobuffer
Then import it in your code, and do your stuff :
var AudioBuffer = require('audiobuffer')
var audioBuffer = new AudioBuffer(1, 100000, 44100)
###AudioBuffer(numberOfChannels, length, sampleRate)
Creates an empty AudioBuffer
with numberOfChannels
channels and length
frames.
####getChannelData(channel)
Returns a channel
.
####slice(start, end)
Returns a slice of the calling AudioBuffer
.
The arguments have the same meaning as a standard Array.slice
.
The slice happens in the length, therefore the returned buffer has the same number of channels and the same sample rate as the calling AudioBuffer
.
####concat(audioBuffer)
Returns a new AudioBuffer
, result of the concatenation of the calling instance with audioBuffer
.
audioBuffer
must have the same number of channels and the same sample rate as the calling instance, or an error will be thrown.
This method behaves similarly to Array.concat
.
The concatenation happens in the length, therefore the returned buffer has the same number of channels and the same sample rate than the calling AudioBuffer
.
####set(audioBuffer, offset)
Sets the calling audio buffer channels with the values from audioBuffer
, starting at offset
###Class methods
####filledWithVal(val, numberOfChannels, length, sampleRate)
Returns an AudioBuffer
, each sample filled with val
.
####fromArray(array, sampleRate)
Returns an AudioBuffer
, with data taken from array
. Example :
// Creates a stereo AudioBuffer of length 5 and sample rate 22050.
var audioBuffer = AudioBuffer.fromArray([
[1, 0.5, 0.2, 1, 0.5],
[-1, -0.8, -0.7, -0.6, 0.3],
], 22050)
0.2.0
0.1.0