I have an ATI 2600XT video card and I have it hooked up to my Denon 3808Ci receiver via HDMI. I get picture and sound but I don't get 5.1 or 7.1 audio. Is there something I'm missing? What do I need to do?
That's odd. Right click on the audio icon in the tray, go to playback devices, and hit properties on the audio output for the card. In those properties, go to the "supported formats" tab, and make sure that dolby digital and DTS are selected.