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The channelCountMode property of the AudioNode interface represents an enumerated value describing the way channels must be matched between the node's inputs and outputs.

The possible values of channelCountMode and their meanings are:

Value Description The following AudioNode children default to this value
max The number of channels is equal to the maximum number of channels of all connections. In this case, channelCount is ignored and only up-mixing happens. GainNode, DelayNode, ScriptProcessorNode, ChannelMergerNode, BiquadFilterNode, WaveShaperNode
clamped-max The number of channels is equal to the maximum number of channels of all connections, clamped to the value of channelCount. PannerNode, ConvolverNode, DynamicsCompressorNode
explicit The number of channels is defined by the value of channelCount. AudioDestinationNode, AnalyserNode, ChannelSplitterNode

In older versions of the spec, the default for a ChannelSplitterNode was max. 

Syntax

var oscillator = audioCtx.createOscillator();
oscillator.channelCountMode = 'explicit';

Value

A enumerated value representing a channelCountMode.

Example

var AudioContext = window.AudioContext || window.webkitAudioContext;

var audioCtx = new AudioContext();

var oscillator = audioCtx.createOscillator();
var gainNode = audioCtx.createGain();

oscillator.connect(gainNode);
gainNode.connect(audioCtx.destination);

oscillator.channelCountMode = 'explicit';

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
channelCountModeChrome Full support 14Edge Full support 12Firefox 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 Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support

See also

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