B♭ Diminished 7th
::
B♭
D♭
F♭
G
B
F♯
D
A
𝄫7
B♭
♭3
♭5
⬤
⬤
B♭
♭3
⬤
♭5
𝄫7
⬤
⬤
♭3
♭5
⬤
𝄫7
B♭
⬤
⬤
♭5
𝄫7
B♭
♭3
⬤ ⬤
⬤ ⬤