I currently have a no-name PC sound card that doesn't do a very good job of playing music through my amp. I have tried going with a Turtle Beach Santa Cruz sound card, and the quality is better, however I still can't hear all the sounds I can by playing CDs, as though parts of the music is missing. I'm wondering if anyone else has experienced this, as I'm trying to determine if it is the MP3's I'm downloading or the sound card itself.