Am9 guitar chord
The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped.
- Tap a note to hear it
- Arrows change position
- Fingers, notes or intervals
- Play the chord
About Am9 — drop 3 voicings
Am9 is A, C, E, G and B — Am7 with the ninth stacked above it.
It sounds warm, and considerably richer than an m7. The standard voicing for a ii chord once the plain one has been played enough.
Am9 notes and formula
| A | C | E | G | B |
|---|---|---|---|---|
| 1 | ♭3 | 5 | ♭7 | 9 |
Pre-dominant or minor tonic — an m7’s job with more colour.
Also written Amin9, A-9 or A minor 9. The same chord either way; which spelling you meet depends on who wrote the chart.
How to play Am9
The same operation one voice further down: the third voice from the top falls an octave and becomes the bass.
That leaves a bigger hole under the top three notes, so a string gets skipped: the muted string in the middle is the shape, not a mistake.
Am9 has 9 of them, on strings 5-3-2-1 and strings 6-4-3-2, from open position up to the 13th — every inversion the chord has: A in the bass, C in the bass, G in the bass and B in the bass. The one to learn first is the B shape at the nut.
5 of them sit on strings 5-3-2-1, so you can run the inversions up one set without changing strings — which is the whole reason to learn them as a family rather than as separate grips.
Start with x02413 — no barre and 1 open string. 1 of the 9 shapes here sits in open position. 4 of the 9 need a barre. Together they cover the neck from the 1st fret to the 12th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x22213 | 1st fret | B, 9th in the bass | G | barred |
| x02413 | open position | A, root position | G | 1 open string |
| xx2413 | 1st fret | E, 2nd inversion | G | all fretted |
| 53x453 | 3rd fret | A, root position | G | all fretted |
| x35455 | 3rd fret | C, 1st inversion | A | barred |
| 575557 | 5th fret | A, root position | B | barred |
| 809080 | 8th fret | C, 1st inversion | G | 3 open strings |
| 8-10-9-9-10-8 | 8th fret | C, 1st inversion | C | all fretted |
| x-12-10-12-12-x | 10th fret | A, root position | B | barred |
The same notes rebuilt from scratch give 3 shell, 12 drop 2, 14 rootless and 6 open string voicings, each on its own page.
Tensions. A shell of Am9, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (D) and the 13 (F#).
How to use Am9
How you get to it. The turn that lands on Am9 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.
In which keys. Every note of Am9 belongs to C major (the vi, the submediant), E minor (the iv, the subdominant), G major (the ii, the supertonic) and A minor (the i, the tonic).
What to play over Am9
Every note of Am9 is in A dorian and A natural minor.
Chords near Am9
Change one note of Am9 and you have Am69 (the flat seventh becomes a sixth), Am7 (drop the ninth), Am11 (add the fourth), AmMaj9 (the flat seventh becomes a major seventh), Amadd9 (drop the flat seventh) or A9 (the minor third becomes a major third).
Am9 is a minor chord — root, minor third, fifth. Minor chords on every root.
On Am9’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.