I have the m-audio audiophile 2496 on my PC and am very happy with it. I cannot answer your question about DTS except to point you to what the m-audio product page says. I use it on 2 channel only, mainly to pass digital signal from my audio system to record on the PC. I also do some listening through the analog outs, mainly internet radio (RadioParadise has a new 192 stream that sounds incredible) and occasionally DVD-A's. While it does not compare with my trusty Onkyo single-bit CD player for sound quality, it does sound quite good despite the long cables I'm using. I would have stepped up to the Audiophile 192 that has balanced connectors but it requires WinXP which I don't have. Anyway, m-audio has a good reputation in the pro-audio market and the Audiophile 2496 has worked out well for me on my stereo set up.