I have it set to HD Audio - the same as it has always been. Now, it just doesn't seem to work with the SPDIF connected. It does work though, when "Test"ing it in the Sound Panel, it tests fine. I just don't like that whenever I want to use my headphones, I have to select "Headphones" as my Default Device in the Sound Panel, and then when I am done, go back to select SPDIF as the Default Device. Seems like it should be easier.