I have a Shuttle SG33G5 small-form-factor system, based on an Intel motherboard with a G33 chipset. (It's about 18-24 months old - not the absolute latest stuff.) After installing Windows 7 and all available drivers, I'm stuck with only two-channel digital audio output over the HDMI connection. Any thoughts on how I can get back 7.1 HDMI audio support? There weren't drivers at the Shuttle Web site to replace the ones that come with Windows 7. The system setting to set >2 speakers was grayed out. So it appears that the driver that MS provides only implements 2.0 audio support. Also Googled a bit but haven't yet found a fix.