AudioBuffer: copyToChannel() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
The copyToChannel() method of the AudioBuffer interface copies
the samples to the specified channel of the AudioBuffer, from the source array.
Syntax
js
copyToChannel(source, channelNumber)
copyToChannel(source, channelNumber, startInChannel)
Parameters
source-
A
Float32Arraythat the channel data will be copied from. channelNumber-
The channel number of the current
AudioBufferto copy the channel data to. If channelNumber is greater than or equal toAudioBuffer.numberOfChannels, anINDEX_SIZE_ERRwill be thrown. startInChannelOptional-
An optional offset to copy the data to. If startInChannel is greater than
AudioBuffer.length, anINDEX_SIZE_ERRwill be thrown.
Return value
None (undefined).
Examples
js
const myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);
const 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);
Specifications
| Specification |
|---|
| Web Audio API # dom-audiobuffer-copytochannel |
Browser compatibility
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