Is there a sound card that has optical or coax output for my receiver. The receiver already has Dolby Digital and DTS decoding built in, I don't need the sound card to do that, I just want the digital signal output. I will be using an ATI All-in-Wonder Radeon for my TV out. I want to be able to use my PC as a Home entertainment system to watch DVDs and VCDs on my Sony Trinitron 36" TV and Kenwood Receiver.