HDMI carries audio and video, DVI only carries video.
Yes you do need to have the digital audio feed to the TV. John
New here to this forum, hopefully this question hasn't been asked recently. I've had a 32" Soyo LCD that I bought from Wal-Mart online for about two months now. I just had the HD upgrade settop box from Comcast installed recently. I've been running component to the TV, which has been working perfectly. However, the component picture is only running 480i. I know I could get a better picture. I recently ordered a DVI-D/HDMI cable that should be coming in soon. I have the DVI output on the cable box, along with a SPDIF optical and SPDIF RCA. I have a HDMI input on the TV. I have those two parts figured out. But, I do not have a optical input on the TV. Could I still run the DVI-HDMI cable with the SPDIF RCA to the TV to get sound?
Any help would be appreciated.