Web/API/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`, `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 APIThe definition of 'channelCountMode' in that specification.	Working Draft

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`channelCountMode`	Chrome Full support 14	Edge Full support 12	Firefox Full support 25	IE No support No	Opera Full support 15	Safari Full support 6	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support 26	Opera Android Full support 14	Safari iOS Full support Yes	Samsung Internet Android Full support 1.0

Legend

Full support: Full support
No support: No support