when pairing a BT headset, upon first connection the available services are listed. these services can be viewed under the Device Properties
menu under Set Up Bluetooth
for my Jabra BT500:
for my Jabra BT620s:
- Hands-Free unit
- A/V Remote Control
so the available features are determined by the headset features as read by the device's Set Up app.
i did use the BT500 with dollars5 mediaPlayer for a week (trial), so i think third party apps might muscle the audio through the BT connection, side-stepping what the device wants to do as based on the loaded properties. BTW: the Jabra BT620s are quite keen, although a bit thick on the atmosphere. the A/V RC works well for volume, PLAY/PAUSE and BACK/NEXT, but forward and reverse tracking do not function.