C Major 7th (♭5) :: C E G♭ B

G
D
A
E
3
3
7
♭5
C
7
♭5
C
3
7
C
3
7
♭5
C
♭5
⬤ ⬤
3
⬤ ⬤
C Major 6th :: C E G A

G
D
A
E
5
6
3
6
3
C
5
C
5
6
6
3
C
3
C
5
⬤ ⬤
5
6
3
⬤ ⬤