Audio Issues in the Recording Function

When listening to mixes I recorded in Cross, every here and there (basically rarely, but still) I get some disturbances, like audio clipping, skipping, and silence (usually for 1-3 seconds).
Any ideas?
I have a macbook retina 15 and I use Pioneer DDJ-SB.
Any ideas?
I have a macbook retina 15 and I use Pioneer DDJ-SB.