I recently reinstalled windows, and EVER since I cant get this working. Basically I have two sound cards, an M-audio which connects to my HEADPHONES, and ati graphics card which outputs sound to my receiver through hdmi. Before I installed windows when I switched to the INPUT on my receiver for hdmi audio, my computer would default to the ati as the sound device. And when I did not have the input on my receiver selected, it defaulted to my m-audio card. This worked perfect.

But now since installing windows i have to manually change the sound device. This may not sound LIKE a big deal, but I have others at my house that use the computer and listen to music, who are not computer literate. Basically is there anyone that can help me so that when I select the hdmi input on my receiver, my pc defaults the ati audio output again? ANd when I dont have the hdmi input selected on my receiver for the ati hdmi audio, it defaults back to my m-audio revolution.

I dont know how it just worked great before, and now i have to change sound DEVICES manually and its driving me crazy.Have you tried going to the "Control Panel", "Sound and Audio Devices", the "Audio" tab, and changing the default device from there?