AudioNode: channelCountMode property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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.

Value

The possible values of the channelCountMode enumerated value, and their meanings are:

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.

The following AudioNode children default to this value: GainNode, DelayNode, ScriptProcessorNode, 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.

The following AudioNode children default to this value: PannerNode, ConvolverNode, DynamicsCompressorNode

explicit

The number of channels is defined by the value of channelCount.

The following AudioNode children default to this value: AudioDestinationNode, AnalyserNode, ChannelSplitterNode, ChannelMergerNode

Note: In older versions of the spec, the default for a ChannelSplitterNode was max.

Examples

js
const audioCtx = new AudioContext();
const oscillator = audioCtx.createOscillator();
const gainNode = audioCtx.createGain();
oscillator.connect(gainNode);
gainNode.connect(audioCtx.destination);
oscillator.channelCountMode = "explicit";

Specifications

Specification
Web Audio API
# dom-audionode-channelcountmode

Browser compatibility

See also