I have been using my HTPC for all my movie and music. I use optical out from my pc to my receiver. When I watch movie everything seems fine and my subwoofer will produce the bass but whenever I play music it turns to 2 channel, I use xbmc to play the music and have set the speaker to 5.1 and I have also used foobar 2000. I set my receiver to Dolby Digital II music still won't work. Anyone here use htpc? What is your setting to get your subwoofer working for music?
htpc with Diamond xs71ddl soundcard
Polk M70 front
Polk CS2 Center
Polk RC80i surround
Polk PSw10 Sub