Voicing of F Half Diminished

Drop 2 I

Back to Fm7b5

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Left hand
F2
Right hand
Cb4F4Ab4Eb5
Family
Drop 2

The Drop 2 I voicing of Fm7b5 stacks Cb, F, Ab and Eb from the bottom up: the flat 5th, root, minor 3rd and minor 7th 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 Fm7b5 are Drop 2 II, Drop 2 III and Drop 2 IV.