|You'll want a sound card that can do Dolby Digital Live and/or DTS Connect. |
DDL and DTS-C both encode regular PC audio into a Dolby Digital or DTS bitstream, then send it out the light tube to your receiver. DTS-C is preferable, as it encodes and streams DTS at 1536 Kbps. DDL, in comparison, only encodes and streams Dolby Digital audio at 640Kbps. If you have a decent audio setup, you will hear a difference between the two formats.
All Creative X-Fi and Auzentech cards support DDL and DTS-C. I *think* that the Asus Xonar line of cards also support the technology. Many motherboards aimed at the HTPC market have integrated audio that can do DDL.
Dual-core Opteron 185 @ 3.2GHz
2x 8800GTS in SLI
4GB CL2 PC3200
X-Fi Ti Pro PCI-E
Samsung 24" LCD