The standard grips this chord is usually shown with.
AmMaj9 is A, C, E, G# and B — AmMaj7 with the ninth added on top.
It sounds the same unease with more colour over it. The ninth softens the edge without resolving anything.

| A | C | E | G# | B |
|---|---|---|---|---|
| 1 | ♭3 | 5 | 7 | 9 |
Minor tonic — melodic minor, extended.
Also written AmM9, Am(maj9) or A-Δ9. The same chord either way; which spelling you meet depends on who wrote the chart.
AmMaj9 in 2nd inversion puts E in the bass instead of A, the 5th of the chord. The notes are the same; what changes is what the bass line does, which is most of why you would reach for it — it lets the lowest voice move by step where the root would have jumped.
One of AmMaj9’s 8 common shapes does this: 12-15-14-13-12-12.
Start with x06504 — no barre and 2 open strings. 1 of the 8 shapes here sits in open position. 4 of the 8 need a barre. Together they cover the neck from the 3rd fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 53x454 | 3rd fret | A, root position | G# | all fretted |
| x06504 | open position | A, root position | G# | 2 open strings |
| 5364xx | 3rd fret | A, root position | B | all fretted |
| 576557 | 5th fret | A, root position | B | barred |
| x09998 | 8th fret | A, root position | C | barred |
| 777998 | 7th fret | B, 9th in the bass | C | barred |
| x-12-10-13-12-x | 10th fret | A, root position | B | all fretted |
| 12-15-14-13-12-12 | 12th fret | E, 2nd inversion | E | barred |
The same notes rebuilt from scratch give 3 shell, 7 drop 2, 5 drop 3, 14 rootless and 6 open string voicings, each on its own page.
Tensions. A shell of AmMaj9, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (D) and the 13 (F#).
How you get to it. The turn that lands on AmMaj9 is Bm7♭5 to E7♭9: the ii and the V of A minor, which is where a minor tonic is usually arrived at rather than simply begun on.
Every note of AmMaj9 is in A harmonic minor and A melodic minor.
Change one note of AmMaj9 and you have Amaj9 (the minor third becomes a major third), Am69 (the major seventh becomes a sixth), Am9 (the major seventh becomes a flat seventh), AmMaj7 (drop the ninth), AmMaj11 (add the fourth) or Amadd9 (drop the major seventh).
AmMaj9 is a minor chord — root, minor third, fifth. Minor chords on every root.
On AmMaj9’s sound and use this page follows Mark Levine, The Jazz Theory Book (Sher Music, 1995). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.