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Microsoft BT stack

The situation is in no way so easy as with the Widcomm BT stack as it’s only with phone calls (if the device contains a phone at all) that it will actively use the headset, nothing else (for example, music, GPS instructions etc).

Therefore, you’ll need to use third-party applications to re-route the sound.

There are several solutions to this problem:

BTAudio 810 (also see this and this thread). Works great on the Wizard (with the 2.26 Molski ROM) but not on the Axim x51v (none of the audio re-routing solutions worked on it; therefore, you may end up having to install the Widcomm BT stack on it, which also offers flawless sound redirection to mono, non-A2DP headsets).

Installation: The ZIP file contains three files; just copy them anywhere on your Pocket PC (simply BTAudioToggle.exe may be enough) and, when you want to toggle the sound target, just execute BTAudioToggle.exe (or, alternatively, when you want to start/stop the sound routing, execute BTAudioOn.exe/BTAudioOff.exe, respectively.)

TP.com Btaudio (also see this) didn’t offer anything of importance in the case of the x51v either: with my AKU2.3 A12 ROM, the PDA still wouldn’t discover the Hands-free profile of my headset (only the wireless stereo, but it, in our case, has no use at all). It didn't work on my Wizard either. You may have better luck though; also make sure you read the linked thread (and also look around for other, related threads at XDA-Developers.)

Installation: The downloadable ZIP file contains a CAB file; just install it on your PDA.

Bluetooth sound: (also see this): while it’s reported to work great on the HTC TyTN (Hermes), it has no effect on the Dell Axim x51v / HTC Wizard at all (and is also reported not to work on the HTC Universal either). After installing it, BTAudio 810 stopped working; fortunately, the uninstall worked OK and, then, BTAudio 810 started to work again.

Installation: The downloadable ZIP file contains a CAB file; just install it on your PDA.

Teksoft's BlueMusic: (also see this): you may want to give this title a try too. It doesn’t work on my HTC Wizard (only if you previously enable sound re-routing with BTAudio 810; then, it’ll be able to switch it off and on but this functionality can also be used with the “original” BTAudio 810 and, therefore, there is not much point in installing (and, for that matter, paying for) BlueMusic in addition to the free and smaller BTAudio 810) and Axim x51v, but others have reported success with other models.

Installation: Install the software following the tutorial in install.en.txt in the downloadable ZIP file.

BTAudioNav by infamous PPC hacker, co-author of the Dell Axim x50/x51 Widcomm BT stack hack beemer: this hack allows for redirecting the sound of a particular (for example, GPS) application only. It also makes sure it reconnects to the headset after a phone call, unlike (some of?) the alternatives. It's available here; if you don't want to register yourself in the forum to be able to download the file, you can also get it from here (I've mirrored it there). Please see either the above (Spanish) thread or beemer's comments here for more information on the usage.

Verdict

If you have the Microsoft BT stack, check out BTAudio 810 first - or beemer's BTAudioNav. It’s the smallest and cleanest, free solution, which seems to be working just great. If you have the Widcomm BT stack, just use the built-in headset redirection capabilities (with the necessary hacking with earlier BT stacks if needed).

UPDATE (11/05/2006): discussions of this article: HowardForums.