AudioNode.channelCountMode

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
explicit The number of channels is defined by the value of channelCount. AudioDestinationNode, AnalyserNode, ChannelSplitterNode, DynamicsCompressorNode

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 AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome 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 18Edge Mobile Full support YesFirefox Android Full support 26Opera Android Full support 15Safari iOS ? Samsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

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