AudioBuffer.copyFromChannel()

The copyFromChannel() method of the AudioBuffer interface copies the samples from the specified channel of the AudioBuffer to the destination array.

Syntax

myArrayBuffer.copyFromChannel(destination,channelNumber,startInChannel);

Parameters

destination
A Float32Array to copy the channel data to.
channelNumber
The channel number of the current AudioBuffer to copy the channel data from. 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 from. If startInChannel is greater than AudioBuffer.length, an INDEX_SIZE_ERR will be thrown.

Example

var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);  
var anotherArray = new Float32Array;
myArrayBuffer.copyFromChannel(anotherArray,1,0);

Specification

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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 14.0 webkit (Yes) 27 (27) No support 15 webkit
22 (unprefixed)		 No support
Unprefixed 43.0 (Yes) ? ? ? No support

See also

Document Tags and Contributors

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 Contributors to this page: erikadoyle, halfbyte, jpmedley, eharris, fscholz, teoli, chrisdavidmills
 Last updated by: erikadoyle,