Voicing of D Half Diminished

Drop 2 III

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Left hand
D2
Right hand
D4Ab4C5F5
Family
Drop 2

The Drop 2 III voicing of Dm7b5 stacks D, Ab, C and F from the bottom up: the root, flat 5th, minor 7th and minor 3rd 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 Dm7b5 are Drop 2 I, Drop 2 II and Drop 2 IV.