Voicing of Fb Dominant b5

Drop 2 II

Back to Fb7b5

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Left hand
Fb2
Right hand
Ebb4Ab4Cbb5Fb5
Family
Drop 2

The Drop 2 II voicing of Fb7b5 stacks Ebb, Ab, Cbb and Fb from the bottom up: the minor 7th, major 3rd, flat 5th and root of the chord.

It's one of the Drop 2 voicings: four-note chords in close position with the second note from the top dropped an octave, played over the root. The others for Fb7b5 are Drop 2 I, Drop 2 III and Drop 2 IV.