My experience with RDS Radio: (perhaps its interesting and helpful)
It runs without starting the Acer FM Radio and dont stop, if Power is off.
But I have done nothing special!
What have I done:
1. Started the "btfm.exe"
Silence, as it said stefano
2. Started ACER FM Radio, then btfm.exe
okay Radio reception
3. I made a (only one!) shortcut/link to btfm.exe to startmenu (with TotalCommander)
Suddenly I had two links in the start menu, one for "btfm" and one for "RDS Radio"
5. I used in startmenü the link "RDS Radio" to start it , its the btfm (looks exactly like this).
6. I tested Bluetooth to Headphones - ok
And now the RDS Radio works alone and if I press the power button it it keeps playing.
But if the RDS is playing, the device dont go in the standby itself (after the defined time), only the Display will be dark.
HTC Desire X Android 4.0.4
Samsung Galaxy Tab 10.1v (P7100) Android 4.0.4