Voicing of Diminished 7

Drop 2 IV

Back to Cdim7

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Left hand
C3
Right hand
Eb4Bbb4C5Gb5
Family
Drop 2

The Drop 2 IV voicing of Cdim7 stacks Eb, Bbb, C and Gb from the bottom up: the minor 3rd, diminished 7th, root and flat 5th 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 Cdim7 are Drop 2 I, Drop 2 II and Drop 2 III.