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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

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
copyToChannelChrome Full support 14Edge Full support 13Firefox Full support 25IE No support NoOpera Full support 15Safari Full support 6WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 26Opera Android Full support 14Safari iOS ? Samsung Internet Android Full support Yes


Full support  
Full support
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No support
Compatibility unknown  
Compatibility unknown

See also