Voicing of D Diminished 7

Drop 2 I

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Left hand
D2
Right hand
Ab3D4F4Cb5
Family
Drop 2

The Drop 2 I voicing of Ddim7 stacks Ab, D, F and Cb from the bottom up: the flat 5th, root, minor 3rd and diminished 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 Ddim7 are Drop 2 II, Drop 2 III and Drop 2 IV.