The copyToChannel() method of the AudioBuffer interface copies the samples to the specified channel of the AudioBuffer, from the source array.


myArrayBuffer.copyToChannel(source, channelNumber, startInChannel);


A Float32Array that the channel data will be copied from.
The channel number of the current AudioBuffer to copy the channel data to. If channelNumber is greater than or equal to AudioBuffer.numberOfChannels, an INDEX_SIZE_ERR will be thrown.
startInChannel Optional
An optional offset to copy the data to. If startInChannel is greater than AudioBuffer.length, an INDEX_SIZE_ERR will be thrown.


var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);  
var anotherArray = new Float32Array;
// Copy channel data from second channel of myArrayBuffer.
// Copy data from anotherArray to first channel of myArrayBuffer. Both channels have the same data now.
myArrayBuffer.copyToChannel (anotherArray,0,0);


Specification Status Comment
Web Audio API
The definition of 'copyToChannel' in that specification.
Working Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 14.0 webkit 27 (27) No support 15 webkit
22 (unprefixed)
No support
Unprefixed 43.0 ? ? ? No support
Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support ? 25 (25) 1.2 No support No support No support 28.0 webkit
Unprefixed No support No support ? ? ? ? No support 43.0

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.