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