So i am using a sony vaio laptop that works great. My interface (saffire pro 24) works great, and my monitors (yamaha hs50's) are fine as well. Now my issue is that after having protools open for more than like 15 minutes, everything i play back has a bunch of fuzz. The vocals sounded fine one second and then after a time frame, everything is complete crap. Let me say that i know for a fact that it isn't my interface nor is it my express card(Rain computers) for a fact. Any ideas?