Shout out to our friends at DJ TechTools for this useful tutorial:
“Pioneer’s CDJs are some of the most prevalent pieces of DJ hardware found in current DJ booths, and mixing harmonically has become a critical element of crafting a great set for many DJs. Today, Chris Brackley goes through a few of the best ways to mix in key on Pioneer’s CDJ units — including a little-known trick on newer CDJs where they’ll use a stoplight system to let you know if an upcoming track is compatible with the playing one. Watch the full thing and read more in today’s article.”
Related: How to Use Pioneer CDJ’s Slip Mode Feature