I profess no knowledge of the differences between DVI and HDMI, but I'm pretty certain DVI doesn't carry audio signals, ever. There must be another way to do what you are trying to do?
Edit: I'm seeing that some of the newest cards have proprietary DVI HDMI converters that jury rig the sound through a DVI connection. Make sure you have the converter that was shipped with the card. That said, it has never been official, but improvised. I'd see what the manufacturer has to say about your card's abilities.
Edited by Ryan 3000, 19 July 2011 - 04:47 PM.
No pessimist ever discovered the secrets of the stars, or sailed to an uncharted land.