Mapping a dedicated "Shift" button for secondary functions is often restricted or requires complex workarounds with external software Crossfader Inversion:
If you own a Mixtrack Pro 2, you face a dilemma. The controller is not "natively" supported by rekordbox. You cannot simply plug it in and have it work out of the box. But does that mean you are forced to buy new hardware? Absolutely not. numark mixtrack pro 2 rekordbox mapping