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A°7 Chord on Guitar

A°7 is the A diminished 7th chord — 4 notes (A, C, E♭, G♭) built from the formula 1 ♭3 ♭5 ♭♭7. Below are playable shapes across the fretboard, the keys it belongs to and the scales to use when soloing over it.

Notes: A · C · E♭ · G♭Formula: 1 · ♭3 · ♭5 · ♭♭7Hear it and see it on the fretboard ▸

A°7: Chord shapes (open & barre)

  • A°7 – open position×R♭5R♭3♭♭7open position
  • A°7 – fret 44R♭5♭♭7♭3♭5×fret 4
  • A°7 – fret 55R♭5R♭3♭♭7Rfret 5
  • A°7 – fret 77××R♭5♭♭7♭3fret 7
  • A°7 – fret 1010×R♭3♭♭7R♭5fret 10
  • A°7 – fret 1111×R♭5♭♭7♭3♭5fret 11

A°7: Drop 2 voicings

  • A°7 – bass: ♭510♭5R♭3♭♭7××bass: ♭5
  • A°7 – bass: ♭55×♭5R♭3♭♭7×bass: ♭5
  • A°7 – bass: ♭5××♭5R♭3♭♭7bass: ♭5
  • A°7 – bass: ♭♭7♭♭7♭3♭5R××bass: ♭♭7
  • A°7 – bass: ♭♭78×♭♭7♭3♭5R×bass: ♭♭7
  • A°7 – bass: ♭♭7××♭♭7♭3♭5Rbass: ♭♭7
  • A°7 – bass: R4R♭5♭♭7♭3××bass: R
  • A°7 – bass: R11×R♭5♭♭7♭3×bass: R
  • A°7 – bass: R7××R♭5♭♭7♭3bass: R
  • A°7 – bass: ♭37♭3♭♭7R♭5××bass: ♭3
  • A°7 – bass: ♭3×♭3♭♭7R♭5×bass: ♭3
  • A°7 – bass: ♭310××♭3♭♭7R♭5bass: ♭3

A°7: Drop 3 voicings

  • A°7 – bass: ♭37♭3×R♭5♭♭7×bass: ♭3
  • A°7 – bass: ♭3×♭3×R♭5♭♭7bass: ♭3
  • A°7 – bass: ♭510♭5×♭3♭♭7R×bass: ♭5
  • A°7 – bass: ♭55×♭5×♭3♭♭7Rbass: ♭5
  • A°7 – bass: ♭♭7♭♭7×♭5R♭3×bass: ♭♭7
  • A°7 – bass: ♭♭78×♭♭7×♭5R♭3bass: ♭♭7
  • A°7 – bass: RR×♭♭7♭3♭5×bass: R
  • A°7 – bass: R11×R×♭♭7♭3♭5bass: R

A°7: Shell voicings (jazz)

  • A°7 – R-3-7R♭3♭♭7×××R-3-7
  • A°7 – R-3-710×R♭3♭♭7××R-3-7
  • A°7 – R-7-3R×♭♭7♭3××R-7-3
  • A°7 – R-7-311×R×♭♭7♭3×R-7-3

Scales to play over A°7

Ordered from the most common choice. All of them contain A, C, E♭, G♭.

Other A chords

Triads

Sevenths

Sixths

Added

Extended

Diminished 7th chords in other keys

FAQ

What notes are in the A°7 chord?
A°7 (A diminished 7th) contains A, C, E♭, G♭ — formula 1 ♭3 ♭5 ♭♭7.
How do you play A°7 on guitar?
A common shape is x01212 (low E to high E, x = muted string, open position). This page shows more shapes, drop 2, drop 3 and shell voicings in the interactive library.
What scale goes with A°7?
Good choices to solo over A°7: A Diminished (whole-half), A Superlocrian 𝄫7, A Locrian ♮6.