A Diminished 7th, 1st inversion (C in the bass)

CAEbGb
4 4
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Notes, from the bass up

C (bass)EbGbA

The same notes as A Diminished 7th (C, Eb, Gb and A), rearranged so C is the lowest note. Use it to move between chords with smaller jumps across the keyboard.

See the full A Diminished 7th page for root position, every other inversion, open voicings and the chord formula.