Hi there, I am using Logic Pro, version 9.1.8 (1700.67) (32-Bit), which I recently installed on my MacBook Pro (specs below). Mid 2012 2,5 GHz Intel Core i5 16 GB 1600 MHz DDR3 Intel HD Graphics 4000 1024 MB OS X 10.9.5 (13F1112) I am using an old mBox interface (Digidesign mbox 2 mini), just to record demo vocal and acoustic guitars, it shouldn’t be too much for my CPU, especially since I recently pimped my laptop with extra ram and a flash HD. My problem is that at some point when recording, the line 1 & 2 signals (vocal mic and guitar) will start distorting. Sometimes it happens after 5 minutes, sometimes after 20, sometimes after 2 minutes, the time seems to be completely random. The distortion is quickly fixed however, by changing the I/O Buffer Size, it doesn’t matter to what value… Then the whole cycle starts again! It’s starting to make me go crazy as I can never get any proper work done, would very much appreciate any suggestions you might have. Thanks in advance!!!