D♭ Dominant 7th (♭5)
::
D♭
F
G
B
A
E
C
G
♭5
3
D♭
♭7
⬤
♭5
⬤
D♭
♭7
⬤
3
⬤
D♭
⬤
♭7
♭5
⬤
3
⬤
D♭
⬤
♭5
3
♭7
⬤ ⬤
♭5
⬤ ⬤