Amaj9
Extended · A root
Amaj9
Lush and expansive. Adds colour above the major 7th chord.
0 st4 st7 st11 st14 st
Notes in Amaj9
ARoot
C#3rd
E5th
G#7th
B9th
A is the reference pitch (A440). Very common in rock and pop — the vi chord in C major.
Identify the Chord Quality on A
Each chord below is played on A. Listen and identify whether you heard Amaj9, Am, A7, or another quality — the hardest and most useful ear training skill.
Major 9th in All 12 Keys
Other Chords in A
Related Extended
About the Amaj9 Chord
The Amaj9 chord is a major 9th chord built on A. It contains the notes A, C#, E, G#, B — the root, third, fifth, seventh, and extensions.
Lush and expansive. Adds colour above the major 7th chord. Practising the Amaj9 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.