As far as not many plug-ins, I am using 2 aux 1=waves rverb and 2=cakewalk delay. I insert about 3- 5 comps, and 3-5 eqs , and whenever posible I do a "process audio" to free up cpu. I defrag every week and I have also optimized my computer from musicxp.net ( thanks moskus ) All to no avail though. RE. "VIA SONAR CLEAN UP THE AUDIO FOR THE PROJECT", do you mean to just clean the audio folder. For some reason that freaks me out?? I save on a per project folder basis if that helps. I also did waht Sonar said just this weekend and went to the notepad and changed the "stop if starved" from 1 to 0. Didn't help.