Originally Posted by /dev/null
I believe AVRCP is also responsible for allowing you to skip/pause/replay tracks from a BT audio headset. (I thought this was part of AVRCP and not A2DP, but not 100% certain).
I can confirm that Bluetooth music still sounds like S___ on 4.90 though, so it really doesn't matter.
Yep AVRCP is basically control over a device playing music like pause/play/skip. It actually goes hand and hand with A2DP. A2DP is just the stereo music side of of hearing your music, but does nothing to actually allow you to control your music via a remote device.