I am receiving static noise during multi-track session playback on 3 or 4 of the lead guitar tracks. When I mute all but one of the tracks, they play fine. When they're all combined, the static is present. I'm stumped.

P4 3.2
Intel motherboard
500 mb ram
80 gb ATA HD
Soundblaster Audigy2 ZS sound card

Also, playback glitches often. It's really irritating. This system should be more than powerful enough to handle this software.