Piano Reference: A diminished chord (Adim) & A diminished 7th Chord (Adim7)

Interactive piano reference to the A diminished chord, abbreviated as Adim or A°. The A diminished chord consists of the notes A, C and E♭. The 2 inversions to the A diminished chord are C E♭ A and E♭ A C.

The A diminished 7th chord, abbreviated as Adim7 or A°7, has the notes A, C, E♭ and G♭. The 3 inversions to the A diminished 7th chord are C E♭ G♭ A, E♭ G♭ A C and G♭ A C E♭.

In the root position, the A diminished chord has the A as the root, the C as the minor third and the E♭ as the diminished fifth. With the A diminished 7th chord there's the addition of G♭ as the diminished seventh.

arpeggiate chords

A diminished chord

notes: A C E♭

A
C
E_♭

A diminished 1st inversion

notes: C E♭ A

C
E_♭
A

A diminished 2nd inversion

notes: E♭ A C

E_♭
A
C

A diminished 7th chord

notes: A C E♭ G♭

A
C
E_♭
G_♭

A diminished 7th 1st inversion

notes: C E♭ G♭ A

C
E_♭
G_♭
A

A diminished 7th 2nd inversion

notes: E♭ G♭ A C

E_♭
G_♭
A
C

A diminished 7th 3rd inversion

notes: G♭ A C E♭

G_♭
A
C
E_♭

⌨️ hint: use numbers 1 to 7 on a computer keyboard to trigger the chords and their inversions.

lookup a different chord:

C major D major E major F major G major A major B major C^♯ major D^♯ major F^♯ major G^♯ major A^♯ major

C minor D minor E minor F minor G minor A minor B minor C^♯ minor D^♯ minor F^♯ minor G^♯ minor A^♯ minor

C dim D dim E dim F dim G dim B dim C^♯ dim D^♯ dim F^♯ dim G^♯ dim A^♯ dim

more music theory references & tools:

Mini Music Machine

Major & Minor Scales (piano reference)

Circle of Fifths

Music Intervals (ear training)

Chords in keys (chord player)

Interval Calculator

Modes of the Major Scale

piano samples

The piano samples used here are from “ Salamander Grand Piano V3 ” by Alexander Holm, licensed under CC BY 3.0.