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 use the flanger on the Denon DN-S1200 mixer. This video shows you how to use one of the effects known as the flanger effect. Watch this DJ tutorial so you can learn how to use the flanger on the Denon DN-S1200 mixer.