Am9 chord
The A minor ninth chord (abbreviated "Am9 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 minor seventh chord.
In practice, the fifth (E) is sometimes omitted from the Am9 chord because it's not always possible to play all notes simultaneously.
Name
A minor ninth chord
Notes
A C E G B
Intervals
1 ♭3 5 ♭7 9
Chord symbol
Am9
Alternative symbols
A–9 Ami9 Amin9
Type
pentad (five-note chord)