C Major 7th (♭5) :: C E G♭ B

F
C
G
D
C
♭5
3
3
7
♭5
C
7
♭5
C
3
7
C
3
7
♭5
⬤ ⬤
C
⬤ ⬤
F Minor 6th :: F A♭ C D

F
C
G
D
F
5
6
♭3
6
♭3
F
F
5
♭3
5
6
♭3
6
F
5
⬤ ⬤
F
5
6
⬤ ⬤