EDIT: I've raised a brainstorm for this now: http://maemo.org/community/brainstor...dio_priorities

I've raised a wishlist bug - please vote on it: "Bug 6560"

Below is what I've put in the bug - any further suggestions or improvements?

EXACT STEPS LEADING TO PROBLEM:
Example senarios:

1) I'm in the car with bluetooth stereo and bluetooth headset - I want A2DP audio to go to the stereo for music and phone calls to go to the headset and all other "system" sounds to go the device and the headset - not the stereo.

2) I'm at home, have Bluetooth speakers that support A2DP and various other profiles but have no microphone - I want to be able to tell N900 to never try and use audio in for this device - and preferably never to use this device for a call.

EXPECTED OUTCOME:

The solution I want is both (or at least one) of

a) I want priority list for each service type such as "Music", "Phone calls", "System alerts", "Ring tones", "Alarm tones" I set which devices to use in order, or not at all - including the system speaker/headphones!

so can have:
"phone calls":
1) Jabra BT530
2) Jawbone Prime
3) Sony Stereo xxx
4) Wired headset
5) Internal
-) Blackbox Mini

(The blackbox has no mic so out of the list)

"Music"
1) Sony Stereo xxx
2) Blackbox mini
3) Jabra BT530
4) Wired headset
5) Internal
-) Jawbone Prime

(Although you _can_ play music on the prime - its crap, and I'd rather it go to the speakers even when I have the prime in my ear, on and connected)

b) in the Paired devices list to be able to set "controls" on every device - ie be able to set options for each device like:

- type = music / phone calls / any
- phone
- ring_tones = yes / no / exclusive
- alarm_tones = yes / no / excluseive
- system_tones = yes / no / exclusive

where exclusive means to not send to other devices lower in the priority order or internal speakers.

I'm liking this. I've just tried the n900 with my car kit which only opens an audio channel until a call is in progress. Now, bringing the n900 into the car effectively mutes the n900

As it is clear that the n900 can route different audio to different speakers and change that routing on the fly (I'm guessing via pulseaudio), doing this isn't beyond possibility. I like the thought of intelligently changing routing depending on individual device also.

If you have multiple bluetooth enabled stereos then a walkthrough ofthe house would be an awesome demo.