1. I installed the slipstreamed version of Vista SP1 Ultimate 32bit (clean install) on my computer.
2. Attached to my computer is a Plantronics USB headset for VoIP telephony.
3. I didn't have to install additional audio drivers since sound worked directly after I had Vista installed.
4. However, I'm unable to change the default playback device (which is set to the USB headset currently) to the internal sound card.
5. When I do that in "Sound" of the control panel, the green check box changes, but when I close the window and re-open it, the default device is again the USB headset. I did notice though that after such procedure the Windows Sounds are played back on the correct speakers (and not on the headset). So something changes apparently...
6. I also tried changing it through WMP as was suggested here, but that didn't help in any way at all. Speaking of which: Where exactly did you change those settings (I did under Tools\Options\Devices\Speakers).
7. I also noticed that when I boot and log into Vista, the sound plays fine on my speakers (and not on the USB headset). However, once logged into Vista, the default sound device is (again) the USB headset.
This is really a nightmare. If I want sound on my speakers I need to disable the headset. Yet then I cannot use VoIP anymore. (And vice versa).
Any ideas which registry tweak might solve this? It looks to me like something in Vista is interfering with/overriding whichever device is selected as the default playback device. What do you think could cause and solve this?