I tried hooking the TV out to my AUX input on the sound card. Didn't like it at all.
You have to daisy-chain the CD sound. Plug the line from your CD or DVD into the input of the Voodoo3 3500. Hook the output of the 3500 into the CD input of the sound card. Should work fine. The V3 3500 likes to work as a pass-through.
(Ignore my system specs on this reply. My wife has the V3 3500 setup on her PC. We both like having tuners in the corner of the screen when doing "real" work)