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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

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	14	Yes	25	No	15	6