Hello All I cannot not get PowerDvd to play anything other than PCM over HDMI (by selecting 2 channel speakers in audio tools). I can get it to play Dolby digital if I connect via optical and select SPDIF output in the audio tools. I have my HTPC connnected to my Sony amp via the HDMI lead from my Asus 2600XT graphics card. In my realtek audio properties for the HDMI connection it will play DD, DTS etc, and the amp sees these. Also if I play a DVD via Vista Media Center, it also shows DD on the amp (havent found a DTS dvd yet). So the quesiton is, can you get PowerDvd to playback HD audio, DTS, DD, etc via the HDMI output from your graphics card? I am sure its not a sound driver issue as the VMC plays DD on dvds over HDMI, so it must be a Powerdvd setup issue or it doesnt even support it. Help?