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