I have an old chaintech 710 sound card on my vista computer. I use it to bitstream dvds and for two channel pcm from mp3s using optical. However, using the envy drivers, I cannot get bitperfect output from my mp3s without sacrificing my bitsreaming of dvds. IS there a cheap card that will allow me to accomplish both bitperfect and the bitsreaming of dvd? As in, is there a card that will automatically adjust from 48 khz to 44.1?