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G♭ Dominant 7th (♭5) :: G♭ B♭ B♯ F♭

B
F♯
D
A
G♭
♭5
3
♭7
♭5
3
G♭
♭7
♭5
G♭
♭7
3
G♭
♭7
♭5
3
⬤ ⬤
G♭
⬤ ⬤