On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 14 on 2011-09-16 Note: Starting in Chrome 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In Chrome Android version 18 on 2012-06-27 Note: Starting in Chrome Android 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In Edge version 12 on 2015-07-29
In Firefox version 25 on 2013-10-29
In Firefox for Android version 25 on 2013-10-29
Not in Internet Explorer
In Quest Browser version 5.0 on undefined Note: Starting in Quest Browser 5.0, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In Opera version 15 on 2013-07-02 Note: Starting in Opera 43, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In Opera Android version 14 on 2013-05-21 Note: Starting in Opera Android 43, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In Safari version 6 on 2012-07-25
In Safari on iOS version 6 on 2012-09-10
In Samsung Internet version 1.0 on 2013-04-27 Note: Starting in Samsung Internet 6.0, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In WebView Android version 4.4.3 on 2014-06-02 Note: Starting in version 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
In WebView on iOS version 6 on 2012-09-10