B♭ Dominant 7th
::
B♭
D
F
A♭
A
E
C
G
B♭
5
♭7
3
⬤
B♭
⬤
♭7
⬤
3
5
⬤
B♭
⬤
3
⬤
5
♭7
⬤
⬤
3
B♭
5
♭7
⬤ ⬤
⬤ ⬤