Hello, Currently my HTPC is set up with a receiver and i am not getting 5.1 experiance! When i have the receiver on to dolby digital the sound is very odd and not constant, this might be because of some unknown setting with my soundcard or maybe my optic cable but i cant figure out what is wrong. i have a denon avr-1600 receiver and the chaintek 7.1 soundcard using MCE2k5. thanks in advance