C Major
D Minor
E Minor
F Major
G Major
A Minor
B Diminished
a, b, c, d represent the chord boxes in that order
1, 2, 3, 4, 5, 6, 7 respond the chords in that order
[box letter] + [chord number]
= add chord to box[box letter] + x
= delete chord from boxp
= play chord prog[chord number] + s
= play that chordl
= clear code prog