Add chord underlying

Add Chord

Chord that has been recorded

M | m | 7 | M7 | m7 | sus4 | aug | dim | add9 | 6 | m6

Find substitute chord of chord you want to change.

substitute chord

Chord that has been recorded

M | m | 7 | M7 | m7 | sus4 | aug | dim | add9 | 6 | m6