The maxchannelCount property of the AudioDestinationNode interface is an unsigned long defining the maximum amount of channels that the physical device can handle.

The AudioNode.channelCount property can be set between 0 and this value (both included). If maxChannelCount is 0, like in OfflineAudioContext, the channel count cannot be changed.


var audioCtx = new AudioContext();
var myDestination = audioCtx.destination;
myDestination.maxChannelCount = 2;


An unsigned long.


The following would set up a simple audio graph, featuring an AudioDestinationNode with maxChannelCount of 2:

var audioCtx = new AudioContext();
var source = audioCtx.createMediaElementSource(myMediaElement);
audioCtx.destination.maxChannelCount = 2;

To see a more complete implementation, check out one of our MDN Web Audio examples, such as Voice-change-o-matic or Violent Theremin.


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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
maxChannelCountChrome 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 1.0


Full support  
Full support
No support  
No support

See also