root position: Abdim7
A♭ – C♭ – E𝄫 – G𝄫
Abdim7 Piano Chord
The A flat diminished 7 chord (A♭dim7) is made of the notes A♭, C♭, E𝄫 and G𝄫. Its formula is 1 – ♭3 – ♭5 – 𝄫7.
Notes in A♭dim7
| Note | Formula | Interval from root |
|---|---|---|
| A♭ | 1 | root |
| C♭ | ♭3 | minor 3rd |
| E𝄫 | ♭5 | diminished 5th |
| G𝄫 | 𝄫7 | diminished 7th |
How to play A♭dim7 on piano
- Right hand: fingers 1-2-3-5
- Left hand: fingers 5-3-2-1
Fingers are numbered from the thumb (1) to the little finger (5).
A♭dim7 inversions
1st inversion: Abdim7/Cb
C♭ – E𝄫 – G𝄫 – A♭
2nd inversion: Abdim7/Ebb
E𝄫 – G𝄫 – A♭ – C♭
3rd inversion: Abdim7/Gbb
G𝄫 – A♭ – C♭ – E𝄫
Other names for Abdim7
A♭dim7 is also written as A♭dim7, Ab°7, A♭°7, G#dim7, G♯dim7, G#°7, G♯°7.
Keys that contain A♭dim7
A♭dim7 is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.