Amaj9 chord
The A major ninth chord (abbreviated "Amaj9 chord") is a five-note chord consisting of the notes A, C♯, E, G♯, and B. The chord is formed by adding a major ninth to a A major seventh chord.
In practice, the fifth (E) is sometimes omitted from the Amaj9 chord because it's not always possible to play all notes simultaneously.
Name
A major ninth chord
Notes
A C♯ E G♯ B
Intervals
1 3 5 7 9
Chord symbol
Amaj9
Alternative symbols
A▵9 Ama9 AMA9 AM9
Type
Pentad (five-note chord)