root position: Abadd9
A♭ – C – E♭ – B♭
The A flat add9 chord (A♭add9) is made of the notes A♭, C, E♭ and B♭. Its formula is 1 – 3 – 5 – 9.
| Note | Formula | Interval from root |
|---|---|---|
| A♭ | 1 | root |
| C | 3 | major 3rd |
| E♭ | 5 | perfect 5th |
| B♭ | 9 | major 9th |
Fingers are numbered from the thumb (1) to the little finger (5).
A♭ – C – E♭ – B♭
C – E♭ – A♭ – B♭
E♭ – A♭ – B♭ – C
A♭add9 is also written as A♭add9, Abadd2, A♭add2, G#add9, G♯add9, G#add2, G♯add2.
A♭add9 is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.