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A♭ Diminished 7th Chord (A♭dim7)

Notes: A♭, C♭, E𝄫, G𝄫. Tap any diagram to hear it.

A♭dim7
Notes
A♭C♭E𝄫G𝄫
Formula
1 – ♭3 – ♭5 – 𝄫7

A♭dim7 on guitar

Open position · most common
4-2-0-1-3-1
Fret 4
4-5-6-4-6-4
Fret 9
x-11-9-10-9-10

Strings from low (left) to high (right). Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. × = don’t play, ○ = open string.

A♭dim7 on ukulele

Fret 1 · most common
1-2-1-2
Fret 4
4-5-4-5
Fret 7
7-8-7-8

A♭dim7 on piano

Other A♭ chords

A♭A♭mA♭7A♭maj7A♭m7A♭sus2A♭sus4A♭dimA♭augA♭6A♭m6A♭9A♭add9A♭7sus4A♭m7♭5

Diminished 7th chords in other keys

Cdim7C♯dim7Ddim7E♭dim7Edim7Fdim7F♯dim7Gdim7Adim7B♭dim7Bdim7

About the A♭ Diminished 7th chord

Diminished seventh chords stack minor thirds all the way up, so the same shape repeats every three frets. They create strong, dramatic tension. A♭dim7 is built from the root (A♭), minor third (C♭), diminished fifth (E𝄫), diminished seventh (G𝄫).

Frequently asked questions

What notes are in the A♭ Diminished 7th chord?

The A♭dim7 chord is made of A♭, C♭, E𝄫, G𝄫: the root, minor third, diminished fifth, diminished seventh.

How do you play A♭dim7 on guitar?

The most common fingering is 4-2-0-1-3-1, from the low E string to the high E string (x = don’t play that string, 0 = open string). It uses a barre at fret 1.

How do you play A♭dim7 on piano?

Press A♭, C♭, E𝄫, G𝄫 together. In root position the lowest note is A♭.