B♭ Half Diminished 7th
::
B♭
D♭
E
A♭
A
E
C
G
♭5
B♭
♭3
♭7
⬤
B♭
⬤
♭3
♭7
♭5
⬤
⬤
B♭
♭3
⬤
♭5
⬤
♭7
⬤
♭3
♭5
⬤
B♭
♭7
⬤ ⬤
♭5
⬤ ⬤