B♭ Dominant 7th (♭5)
::
B♭
D
E
A♭
G
D
A
E
3
♭5
♭7
B♭
♭5
⬤
B♭
⬤
♭7
⬤
3
⬤
♭7
B♭
⬤
3
♭5
⬤
B♭
⬤
♭5
⬤
3
♭7
⬤ ⬤
3
♭5
⬤ ⬤