Even though the Reloop KUT is capable of sending MIDI signals from all faders, buttons and knobs (if the MIDI switcher at the rear panel is set to ON), the entire unit is not controlling the internal mixer of VirtualDJ. The audio mixing is performed by the hardware.
The Crossfader, Equalizer, Filter, Volume faders etc. will move the relative faders of the VirtualDJ GUI, but not vice versa (Fake mixer mode)
The functionality of each button, knob and connection per section (as shown in the image below) will be explained in detail in the next chapters
A. Top panel - Mixer Controls
B. Front & Rear panel - Connections