B♭ Augmented 7th (♭9)
::
B♭
D
G♭
A♭
B
G
D
A
E
3
♭7
B♭
♭9
♯5
⬤
B♭
⬤
♭9
♯5
♭7
⬤
3
⬤
♭7
B♭
⬤
3
♭9
⬤
B♭
⬤
♭9
♯5
⬤
3
♯5
♭7
⬤ ⬤
3
⬤ ⬤