PIC implementation for <Piano>:
Midi Channel 0 (offset 0)


PIC's 1 tot 9: player piano design boards, version2.

PIC1: Note ON/OFF + velo for notes: 21-30
PIC2: Note ON/OFF + velo for notes: 31-40
PIC3: Note ON/OFF + velo for notes: 41-50
PIC4: Note ON/OFF + velo for notes: 51-60
PIC5: Note ON/OFF + velo for notes: 61-70
PIC6: Note ON/OFF + velo for notes: 71-80
PIC7: Note ON/OFF + velo for notes: 81-90
PIC8: Note ON/OFF + velo for notes: 91-100
PIC9: Note ON/OFF + velo for notes: 101-108 
      [109, 110 reserved]
white LED strip added 21.01.2016 connected to note 109 output.
output for note 110: not connected.

144, note, 0 = 128, note, 0

All notes off to be implemented on all PIC's.

Velo-scaling lookups to be implemented, under program change command.

Velocity pulse range: 0.5 - 40ms