Web/API/AudioBuffer/copyToChannel

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

Syntax

myArrayBuffer.copyToChannel(source, channelNumber, startInChannel);

Parameters

source

A Float32Array that the channel data will be copied from.

channelNumber

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.

Example

var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);  
var anotherArray = new Float32Array;
// Copy channel data from second channel of myArrayBuffer.
myArrayBuffer.copyFromChannel(anotherArray,1,0);
// Copy data from anotherArray to first channel of myArrayBuffer. Both channels have the same data now.
myArrayBuffer.copyToChannel (anotherArray,0,0);

Specification

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

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
copyToChannel	Chrome Full support 43	Edge Full support 13	Firefox Full support 25	IE No support No	Opera Full support 30	Safari No support No	WebView Android Full support 43	Chrome Android Full support 43	Firefox Android Full support 26	Opera Android Full support 30	Safari iOS No support No	Samsung Internet Android Full support 4.0

Legend

Full support  

Full support

No support  

No support

See also

• Using the Web Audio API

AudioBuffer.copyToChannel() by Mozilla Contributors is licensed under CC-BY-SA 2.5.