Thanks for the responses guys! So, I continued trying to trouble shoot... after a system reboot, including powering everything off for 30 seconds, Pro Tools was recording at the correct pitch again. However, the Bomb Factory tuner, weighted @ 440hz, still reads -10 cents when receiving 440hz @ -20db from the signal generator. I checked this out on my system at work, which is a G5, and the tuner reads correctly!? The next test will be to record the signal generator and see what Auto Tune tells me, cause' I am feeling a little skeptical of the BF Tuner Is it possible that the clock in the Digimax could be dying? Would this cause such an error? Thanks for you help guys!