Abadd9 chord
The A-flat added ninth chord (abbreviated "Abadd9 chord") is a four-note chord consisting of the notes A♭, C, E♭, and B♭. The chord is formed by adding a major ninth to a A-flat major chord.
Often, a major second is played instead of the major ninth since they are the same note.
Name
A-flat added ninth chord
Synonym
A-flat added second chord
Notes
A♭ C E♭ B♭
Intervals
1 3 5 9
Chord symbol
A♭add9
Alternative symbols
A♭(add9) A♭add2 A♭(add2)
Type
Tetrad (four-note chord)