autoGainControl property is a Boolean value whose value indicates whether or not automatic gain control (AGC) is enabled on an audio track. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the
MediaTrackConstraints.autoGainControl property you provided when calling either
Automatic gain control is a feature in which a sound source automatically manages changes in the volume of its source media to maintain a steady overall volume level. This feature is typically used on microphones, although it can be provided by other input sources as well.
If needed, you can determine whether or not this constraint is supported by checking the value of
MediaTrackSupportedConstraints.autoGainControl as returned by a call to
MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.
var autoGainControl = MediaTrackSettings.autoGainControl;
A Boolean value which is
true if the track has automatic gain control enabled or
false if AGC is disabled.
|Media Capture and Streams
The definition of 'autoGainControl' in that specification.
|Editor's Draft||Initial specification.|
|Feature||Chrome||Firefox (Gecko)||Internet Explorer||Opera||Safari|
|Feature||Android||Android Webview||Firefox Mobile (Gecko)||IE Mobile||Opera Mobile||Safari Mobile||Chrome for Android|