MediaTrackSettings.channelCount

The MediaTrackSettings dictionary's channelCount property is an integer indicating how many audio channel the MediaStreamTrack is currently configured to have. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the MediaTrackConstraints.channelCount property you provided when calling either getUserMedia() or MediaStreamTrack.applyConstraints().

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.channelCount as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.

Syntax

var channelCount = MediaTrackSettings.channelCount;

Value

An integer value indicating the number of audio channels on the track. A value of 1 indicates monaural sound, 2 means stereo, and so forth.

Example

See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.

Specifications

Specification Status Comment
Media Capture and Streams
The definition of 'channelCount' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome No support NoEdge ? Firefox No support NoIE ? Opera No support NoSafari ? WebView Android ? Chrome Android No support NoEdge Mobile ? Firefox Android No support NoOpera Android No support NoSafari iOS ? Samsung Internet Android ?

Legend

No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Contributors to this page: fscholz, Sheppy
Last updated by: fscholz,