On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 14 on 2011-09-16
In Chrome Android version 18 on 2012-06-27 Note: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.
In Edge version 12 on 2015-07-29
In Firefox version 25 on 2013-10-29 Note: Sometimes jumps to value immediately. See bug 2011524.
In Firefox for Android version 25 on 2013-10-29 Note: Sometimes jumps to value immediately. See bug 2011524.
Not in Internet Explorer
In Quest Browser version 5.0 on undefined Note: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.
In Opera version 15 on 2013-07-02
In Opera Android version 14 on 2013-05-21
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
In WebView Android version 4.4 on 2013-12-09 Note: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.
In WebView on iOS version 6 on 2012-09-10