A♭ Dominant 7th :: A♭ C E♭ G♭

B
F♯
D
A
♭7
3
5
A♭
3
5
♭7
3
A♭
5
♭7
A♭
5
♭7
3
A♭
⬤ ⬤
♭7
⬤ ⬤