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The channelCount property of the AudioNode interface represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node.

channelCount's usage and precise definition depend on the value of AudioNode.channelCountMode:

  • It is ignored if the channelCountMode value is max.
  • It is used as a maximum value if the channelCountMode value is clamped-max.
  • It is used as the exact value if the channelCountMode value is explicit.


var oscillator = audioCtx.createOscillator();
var channels = oscillator.channelCount;


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

var audioCtx = new AudioContext();

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




An integer.


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support14 Yes25 No156
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support Yes14 Yes26 No15 ?

See also

Document Tags and Contributors

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