Reply to Pitch skipping, fluctuating on its own?!! HELP!

I'm not sure what this has to do with but as I'm playing tracks, the pitch will go up and down on its own. It makes the songs sound horrible, I'm wondering if its the tracks I'm playing, audio 8, multicores, quartz lock? How do I fix it or turn it off?

Thanks

I'm running TSP 2.6, control vinyl, audio 8, multicores on a macbook pro.