midiBlackKeyFilter

Separately adjust velocity of black and white keys, and/or send them on different channels.

Parameters:
	InputCh  Channel to affect: Any, or 1-16
	WhiteCh  Channel to send white keys on: No Change, or 1-16
	WhiteVel  Velocity adjustment in percent for white keys (0-200%)
	BlackCh - Channel to send black keys on: No Change, or 1-16
	BlackVel - Velocity adjustment in percent for black keys (0-200%)
