Guitar · diminished seventh
Adim7 Chord on Guitar
A Diminished 7th is A, C, Eb, Gb — the 1-b3-b5-bb7 pattern of a diminished seventh chord. Here is the shape, the audio, and what usually goes wrong.
There is no open Adim7 on guitar. The one shape below sits up the neck and is rated intermediate.
Start here — Movable Root-6 Shape (4th fret)
Fingered low on the neck with no barre — a useful middle step between the open shape and the movable ones.
What beginners get wrong
Moving in and out of it
The shape above: Movable Root-6 Shape (4th fret).
Listening: each shape above has its own play button, and each one plays the notes that shape actually produces — not a generic triad.
Adim7 on other instruments
Same notes, different hands. Every link below is a real page with diagrams and audio.
Chords next door
Same root, different colour — and all of them playable on guitar.
Adim7 on Guitar — questions people ask
What is the easiest way to play Adim7 on guitar?
“Movable Root-6 Shape (4th fret)” — which we rate intermediate — is the easiest Adim7 shape on guitar. Fingered low on the neck with no barre — a useful middle step between the open shape and the movable ones. There is no open Adim7 on guitar, so a barre is unavoidable; this is the least demanding one.
What notes are in the A Diminished 7th chord?
A Diminished 7th is A, C, Eb, Gb — the 1-b3-b5-bb7 interval pattern of a diminished seventh chord. Every voicing on this page uses those notes and nothing else; they just appear in a different order and octave.
What can I play instead of Adim7?
The nearest stand-ins on guitar that keep the same root are Asus4, Asus2, A. They keep the root and the fifth and only change what sits in the middle, so most songs still work — but check the swap against the melody, because the note you removed may be the one the tune is singing.
Can I play Adim7 on other instruments?
Yes. Adim7 is the same set of notes everywhere; only the fingering changes. This site has diagrams and audio for it on piano, ukulele, bass, mandolin, banjo.
Learn the theory behind Adim7
The shape gets your fingers there. These explain why it sounds the way it does.
Functional Harmony: Three Roles, One Engine
Diminished chords are almost always doing a job. This explains which one.
6 min read
Cadences — The Four Ways a Phrase Ends
Where all that tension goes — how the chord resolves into the next one.
4 min read
Voice Leading — Hold What You Can, Move Only What You Must
Half-steps do the work here. Voice leading is how you find them.
6 min read