Construction
A♭ Diminished Major 7th = Root + Minor 3rd + Diminished 5th + Major 7th = A♭, C♭, E♭♭, G
| Note | Interval | Degree |
|---|---|---|
| A♭ | Root | 1 |
| C♭ | Minor 3rd | ♭3 |
| E♭♭ | Diminished 5th | ♭5 |
| G | Major 7th | 7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| A♭ | black | index finger (2) | little finger (5) |
| C♭ | white | middle finger (3) | ring finger (4) |
| E♭♭ | white | ring finger (4) | middle finger (3) |
| G | white | little finger (5) | index finger (2) |
Right hand: index finger (2) on A♭, middle finger (3) on C♭, ring finger (4) on E♭♭, little finger (5) on G.
Left hand: little finger (5) on A♭, ring finger (4) on C♭, middle finger (3) on E♭♭, index finger (2) on G.
Key Signature
A Diminished Major 7th chord is built from symmetrical or ambiguous intervals, so it doesn't belong to a single key and has no key signature of its own.
Chords in the Key of A♭ Major
These are the triads built on each degree of A♭ Major:
A♭ Diminished Major 7th : Frequently Asked Questions
What is the A♭ Diminished Major 7th chord on piano?
The A♭ Diminished Major 7th chord contains the notes A♭ – C♭ – E♭♭ – G. On piano, play these notes together to sound the chord.