Check out my MIDI controller as Traktor interface. Deck A is on the left, B on the right. I have the scrub functions mapped, and the cue-pause and cue-play buttons. For fun I have the EQ's mapped to the knobs. Levels for the decks are mapped to the vertical faders. I want to change the filter parameter controls for the deck that has focus to use the sliders and use the filter knobs just to apply filter to deck A or B. Fun stuff!