Voicing of A Dominant b5

Drop 2 II

Back to A7b5

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Left hand
A2
Right hand
G3C#4Eb4A4
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Drop 2

The Drop 2 II voicing of A7b5 stacks G, C#, Eb and A 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 A7b5 are Drop 2 I, Drop 2 III and Drop 2 IV.