Construction
A♭ Diminished 7th = Root + Minor 3rd + Diminished 5th + Major 6th = A♭, C♭, E♭♭, G♭♭
| Note | Interval | Degree |
|---|---|---|
| A♭ | Root | 1 |
| C♭ | Minor 3rd | ♭3 |
| E♭♭ | Diminished 5th | ♭5 |
| G♭♭ | Major 6th | 6 |
How to Play the A♭ Diminished 7th
Right Hand (RH)
Place your right hand over the keys with the thumb on the root. Use the fingering: 2 – 3 – 4 – 5
Left Hand (LH)
For the left hand, start with your pinky on the root. Use the fingering: 5 – 4 – 3 – 2
A♭ Diminished 7th Inversions
- Root positionA♭ – C♭ – E♭♭ – G♭♭
- 1st inversion (A♭dim7/C♭)C♭ – E♭♭ – G♭♭ – A♭
- 2nd inversion (A♭dim7/E♭♭)E♭♭ – G♭♭ – A♭ – C♭
- 3rd inversion (A♭dim7/G♭♭)G♭♭ – A♭ – C♭ – E♭♭
Same Notes, Other Names
The notes A♭ – C♭ – E♭♭ – G♭♭ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell the following:
A♭ Diminished 7th : Frequently Asked Questions
What is the A♭ Diminished 7th chord on piano?
The A♭ Diminished 7th chord contains the notes A♭ – C♭ – E♭♭ – G♭♭. On piano, play these notes together to sound the chord.
What notes are in the Ab Diminished 7th chord?
The Ab Diminished 7th chord (Abdim7) contains four notes: Ab (root), Cb (minor third, enharmonically B), Ebb (diminished fifth, enharmonically D), and Gbb (diminished seventh, enharmonically F). All four notes are spaced exactly 3 semitones apart.
How does Ab Diminished 7th differ from Ab Diminished?
Ab Diminished is a three-note triad (Ab, Cb, Ebb). Ab Diminished 7th adds Gbb/F as the diminished seventh, completing the symmetrical structure.
Why is the Diminished 7th chord symmetrical?
Abdim7 contains the same pitches as Ddim7, Fdim7, and Bdim7: all inversions of the same four notes (D, F, Ab, B). Only three unique dim7 chords exist.
How is Ab Diminished 7th used in music?
Abdim7 functions as the vii°7 of A, resolving up by half step to A Major or A minor. It works as a dramatic chromatic passing chord and is common in classical cadences and jazz turnarounds.
What songs use Diminished 7th chords?
Diminished 7th chords appear in Michelle (Beatles), throughout Chopin and Beethoven, and in jazz standards. Film scores and musical theatre use dim7 for dramatic tension.
How many unique Diminished 7th chords exist?
Only three. Abdim7 shares its notes with Ddim7, Fdim7, and Bdim7. The other two groups are Cdim7 and Dbdim7.