Want to mix and scratch like a professional DJ? To be a good DJ you need to understand the concepts of mixing tracks, adding cool effects, and of course you need a good sense of rhythm to line up the beats. This how to video explains how to set the pattern on the jog wheel of the Pioneer CDJ-400 mixer. Nothing in this tutorial is provided as legal advice. It is provided for informational purposes only. Watch this DJ tutorial so you can learn how to set the pattern on the jog wheel of a CDJ-400 mixer.