Voicing of F# Diminished 7

Drop 2 III

Back to F#dim7

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Left hand
F#2
Right hand
F#3C4Eb4A4
Family
Drop 2

The Drop 2 III voicing of F#dim7 stacks F#, C, Eb and A from the bottom up: the root, flat 5th, diminished 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 F#dim7 are Drop 2 I, Drop 2 II and Drop 2 IV.