Based on original DN-SC2900 mapping
* 1-8 Hotcues
* basic track info display (VFD)
* 16 beats jump
* Next/prev hotcue
* Layout switch
* Waveform zoom in/out
* Cue button blink on beat
* ...
* SHIFT + SEARCH - jump 16 beats
* SHIFT + LOOPSIZE +/- - move active loop
* SHIFT + HOT LIST - add to Preparation List
* SHIFT TOGGLE + SEARCH - next/prev hotcue
* MIDIBANK 2 (toggle) - hotcues 5-8
* SHIFT TOGGLE + HOT LIST - change layout
* STOP TIME - waveform zoom
* SHIFT + AUTOLOOP - deck A&B advanced view
* SHIFT + SYNC - tempo master
- Fix hotcue leds sometimes doesn't light up
- Sampler controls (rec/del/set/play)
- Add controls for quantize, snap, auto-grid etc.
- don't use "Blend" when mapping Out LEDs