B♭ Dominant 7th
::
B♭
D
F
A♭
B
F♯
D
A
3
B♭
♭7
⬤
3
5
⬤
B♭
⬤
3
⬤
5
♭7
⬤
⬤
3
B♭
5
⬤
♭7
⬤
B♭
5
♭7
⬤ ⬤
3
⬤ ⬤