The standard grips this chord is usually shown with.
Asus4 is A, D and E — A with the third replaced by the fourth.
It sounds suspended mid-air. Played before the plain chord it is the oldest tension-and-release move there is.

| A | D | E |
|---|---|---|
| 1 | 4 | 5 |
Suspended — classically it resolves down onto the third.
Also written Asus or A suspended 4th. The same chord either way; which spelling you meet depends on who wrote the chart.
Asus4 in root position puts A in the bass, which is the chord as it is spelled: the note it is named after underneath everything else.
7 of Asus4’s 8 common shapes do this: x02230, x00x30, 5x2235, 577755, x-x-7-9-10-10, x-12-12-9-10-x, x-12-14-14-15-12.
Start with x00x30 — no barre and 3 open strings. 2 of the 8 shapes here sit in open position. 1 of the 8 needs a barre. Together they cover the neck from the 2nd fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x02230 | open position | A, root position | E | 2 open strings |
| x00x30 | open position | A, root position | E | 3 open strings |
| 5x2235 | 2nd fret | A, root position | A | all fretted |
| xx2235 | 2nd fret | E, 2nd inversion | A | all fretted |
| 577755 | 5th fret | A, root position | A | barred |
| x-x-7-9-10-10 | 7th fret | A, root position | D | all fretted |
| x-12-12-9-10-x | 9th fret | A, root position | A | all fretted |
| x-12-14-14-15-12 | 12th fret | A, root position | E | all fretted |
The same notes rebuilt from scratch give 50 triad and 5 open string voicings, each on its own page.
Voice by voice, Asus4 → A. One voice moves by a semitone, and 2 notes are common to both chords.
| In Asus4 | Moves | In A |
|---|---|---|
| A, the root | stays where it is | A, the root |
| D, the fourth | falls a semitone | C#, the major third |
| E, the fifth | stays where it is | E, the fifth |
In which keys. Every note of Asus4 belongs to C major (the vi), D major (the V), D minor (the v), E minor (the iv), F major (the iii), F# minor (the ♭III), G major (the ii), A major (the I), A minor (the i) and B minor (the ♭VII).
Every note of Asus4 is in A minor pentatonic, A blues, A major, A mixolydian and A dorian.
Change one note of Asus4 and you have A (the fourth becomes a major third), Am (the fourth becomes a minor third), Asus2 (the fourth becomes a ninth), Asus2sus4 (add the ninth), A5 (drop the fourth) or A7sus4 (add the flat seventh).
Asus4 is a suspended chord — root and fifth, with a second or fourth where the third would be — or nothing at all. Suspended and power chords on every root.
On Asus4’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.