I have my empeg connected to the Line In on my sound card using one of these. However, my sound card happens to be a digital 6 channel integrated into the motherboard, and the sound is much improved when I stream my mp3s from it to Winamp. The audio remains in digital form all the way to the speakers, rather than being converted to analog and then back to digital again. This can be done with Mark Lord's multiuseful Hijack. You'll find a link to it at the top of any page on this BBS.