I have this board: ZOTAC GF9300-D-E LGA 775 NVIDIA GeForce 9300 HDMI Wi-Fi Mini ITX Intel Motherboard. I have searched and cannot find a solution. I am running the latest NVIDIA Drivers / Win 7 machine. I am trying to get 5.1 sound via the HDMI cable and it is selectable / available in the control panel (NVIDIA Sound options). I am only getting stereo sound when play multi-channel dvds (I am using both Boxee and Media Browser playing ISO files). The receiver is setup correctly as my other HTPC works fine with it. When I run the test on the HTPC (via the control panel) I get the tones out of the right and left stereo channels only as well. No middle, surround backs, subwoofer. I have de-installed / re-installed the drivers. I have read where others are getting the sound through the HDMI cable alone. Any suggestions would be appreciated. Thanks.