B♭ Major 7th (♭5)
::
B♭
D
F♭
A
B
F♯
D
A
3
7
B♭
♭5
⬤
3
7
⬤
B♭
⬤
♭5
3
⬤
⬤
7
♭5
⬤
3
B♭
⬤
⬤
7
♭5
B♭
⬤ ⬤
3
7
⬤ ⬤