Modes
There are 2 Modes used by this program:
KeyBoardMode
All of the keys of the midi keyboard are set to their normal pitches (subject to any transposition that may be active).
This may be used with the KBChord SwitchKey, which will play the nearest chord note to the key actually played.
ChordMode
Only the white keys of the midi keyboard are active, and these are assigned to chord notes.