Any suggestion on a USB SOUND CARD capable of DTS & DD via optical cable
there's a cheap startech usb sound card that says it can pass through already encoded (compressed) dts & dd sources (like DVDs) via optical output: StarTech.com ICUSBAUDIO2D USB Stereo Audio Adapter External Sound Card with SPDIF Digital Audio Out, about $30.
this can't encode those though from uncompressed sources like games.