An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful.
Am is A, C and E — A with the third lowered a semitone.
It sounds darker than a major triad, and just as settled. The i of a minor key, and the vi, ii or iii of a major one.

| A | C | E |
|---|---|---|
| 1 | ♭3 | 5 |
Tonic — minor chords rest as readily as major ones.
Also written Amin, A- or A minor. The same chord either way; which spelling you meet depends on who wrote the chart.
An open string left ringing against a fretted grip. It costs no finger, so it can sound a note the closed shape has none left for: a tension on top, or a pedal root underneath.
These belong to their key rather than to a shape: they cannot be moved up the neck. D, A, G and E have many; E♭ has a handful.
Am has 1 of them, only on the bottom four strings, all of them at the 5th fret — all in one inversion, so the bass note never moves. The one to learn first is the E shape at the 5th fret, which is the easiest grip here.
Start with x02210 — no barre and 2 open strings. 2 of the 11 shapes here sit in open position. 3 of the 11 need a barre. Together they cover the neck from the 1st fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x02210 | open position | A, root position | E | 2 open strings |
| x3221x | 1st fret | C, 1st inversion | C | all fretted |
| x02555 | open position | A, root position | A | barred |
| 5322x5 | 2nd fret | A, root position | A | all fretted |
| 577555 | 5th fret | A, root position | A | barred |
| xx7555 | 5th fret | A, root position | A | barred |
| x-0-7-9-10-8 | 7th fret | A, root position | C | 1 open string |
| x-x-7-9-10-8 | 7th fret | A, root position | C | all fretted |
| x-x-10-9-10-8 | 8th fret | C, 1st inversion | C | all fretted |
| x-12-10-9-10-x | 9th fret | A, root position | A | all fretted |
| x-12-14-14-13-12 | 12th fret | A, root position | E | all fretted |
The same notes rebuilt from scratch give 48 triad voicings, each on its own page.
How you get to it. The turn that lands on Am 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 Am belongs to C major (the vi), D minor (the v), E minor (the iv), F major (the iii), G major (the ii) and A minor (the i).
Every note of Am is in A minor pentatonic, A blues, A dorian, A natural minor and A phrygian.
Change one note of Am and you have A (the minor third becomes a major third), Adim (the fifth becomes a flat fifth), Asus2 (the minor third becomes a ninth), Asus4 (the minor third becomes a fourth), Am6 (add the sixth) or Am7 (add the flat seventh).
Am is a minor chord — root, minor third, fifth. Minor chords on every root.
On Am’s sound and use this page follows Edward Aldwell & Carl Schachter, Harmony and Voice Leading (Schirmer / Cengage, 4th ed., 2011). 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.