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;


An integer.


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

var audioCtx = new AudioContext();

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




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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
channelCountChrome 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


Full support  
Full support
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See also

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