5 Hidden Features on the DDJ-400 1️⃣ 1. Changing The Sound Colour FX If you don’t rely heavily on the filter for your transitions, consider changing the filter knob’s function. You can choose from a range of alternative DJM-style sound colour effects, giving you quick access to a fresh way of affecting your audio. 2️⃣ Parameter Buttons a hack for quickly accessing these parameter controls: hold the SHIFT key. In doing so, you gain access to pad mode parameter controls on pads 7 and 8 (the last t