...The issue that I am having is that after a track has been playing for a minute or so, although not exaclty a minute and not all of the time, is that when I go to do anything with the record, from gently nudging it while mixing, go to scratch or hit a beat juggle, I will have a small delay, although very slight, think of it as about an 1/8th note, it is inaccurate enough to throw off a mix for a second, not to mention nailing a scratch or grabbing a beat juggle perffectly. I have a newer loaded MacBook Pro, 16 GB of Ram etc.. I am using a Rane 72. I actually own two 72's and four Twevles (a kit for the road and one for home) and all four twelves do the same thing. I have turned off Pitch N Time, I have tried it using tracks from an external drive, a jump drive and the internal drive, all with the same results. I have tried connecting my Twelves to other friends computers and setups, all with the same results. When I first load a track or the track has not been playing for a long time everything is dead accurate. The only constant in the equation are the Twelves. I am currently using the newest version of Serato but it has been doing it on the previous versions as well. I do not have the same results using my Technics 1200's with my current setup, no delay in any part of the song, no matter how long it has been playing. Anybody else experiencing this? Any feedback would be greatly appreciated.