Article
How to Read Guitar Chord Diagrams
Learn how to read guitar chord diagrams quickly. Understand dots, numbers, Xs, Os, and finger positions so you can play any chord chart at sight.
Adim/C guitar shapes
Popular fretboard positions with fingering suggestions
Showing 8 of 31 playable shapes
About the chord
A diminished / C (1st inversion)
The A diminished diminished chord is built from minor thirds, including a diminished fifth E♭, producing a tense, unstable sound. This dissonant, unresolved tension is commonly used for dramatic transitions, suspenseful moments, or eerie atmospheres in classical, jazz, and film music. With C in the bass, this voicing functions as the 1st inversion of A diminished.
Root note: A
Bass note: C
Chord tones: 3
Playable shapes: 31
Chord tones
ACE♭
Notes & Intervals
Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
A Unison (Root) 1
The root anchors the chord and defines its tonal center.
C Minor Third ♭3
This note supplies the minor color and gives the chord its darker emotional pull.
E♭ Diminished Fifth ♭5
The flattened fifth adds tension and a restless, unstable edge.
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