The Asus2 bass chord is a suspended 2nd chord with the notes A, B, E. On bass it is outlined with the arpeggio A, E, A, B — root, 5th, root, 3rd. Whether you are learning it for the first time or checking a voicing, this page has the notes, the bass fingerings, the inversions and alternatives, and the progressions it appears in.
What notes are in the Asus2 chord?
The Asus2 chord is a suspended 2nd chord, and its notes are fixed: A, B, E. Every voicing on every instrument uses these same notes, in some order and in some octave — change one of them and you are playing a different chord. The table below lists each note with its interval from the root A, so you can see the structure of Asus2 at a glance. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
| Note | Interval |
|---|---|
| A | Root |
| B | 2 |
| E | 5 |
The root is A, the note the chord is named after and the note your ear hears as home. Above it, the intervals in Asus2 are 2, 5. Learn those intervals rather than memorising the shape alone, because the same interval pattern transposed to another root gives you the same quality of chord anywhere. On the bass, the notes appear in the order the fingering dictates, but the set of notes never changes.
Asus2 sounds open, airy and unresolved — with no 3rd, the chord floats instead of declaring major or minor. That character comes straight from the intervals above, not from the instrument: the same notes on piano, guitar or ukulele carry the same colour, even though the voicing changes. On the bass, the arpeggio A, E, A, B outlines Asus2 one note at a time.
Comparing Asus2 with its closest relatives helps to fix it in your ear. In short, sus2 against sus4: Asus2 replaces the 3rd with the 2nd B; the sus4 version replaces it with the 4th D. The sus2 sounds brighter and more open; the sus4 sounds tenser. Hearing the comparison matters more than reading it: play Asus2, then play the chord it is compared with above, and let your ear find the note that changed. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
How to play Asus2 on bass
On the bass, Asus2 is not played as a full chord shape the way it is on guitar or piano. Instead you outline it with an arpeggio: the notes A, E, A, B, which are the chord tones of Asus2 in the order root, 5th, root, 3rd. That pattern is the working shape for this chord on bass, and it tells the listener exactly which chord is sounding, even though you never play all the notes at once.
Practise the arpeggio of Asus2 by playing A on beat one, E on beat two, A on beat three and B on beat four, one note per beat, letting each note ring for its full value. Then play it backwards — B, A, E, A — so your fingers learn the shape in both directions. The root A is the anchor: it is the note the rest of the band listens for, so land on it cleanly and on time, and let the 5th E and the 3rd B colour the bar without pulling attention away from the root.
Once the straight arpeggio of Asus2 is comfortable, try playing just the root A and the 5th E for a whole bar, then add the 3rd B on the last beat as a passing colour. That root-and-5th skeleton is how most bass lines outline Asus2 in a real song, and the full arpeggio is the version you use when the arrangement has space for it. Check the notes with the Bass Chord Finder and the Chord Finder, and practise the arpeggio against a slow metronome so the notes land exactly on the beat.
Common mistakes
These are the mistakes that most often make Asus2 sound wrong on the bass, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Playing the arpeggio as a chord. Strumming all the notes of Asus2 at once on bass sounds muddy and hides the root. Play the arpeggio one note at a time, let each note ring, and keep the root A as the note the listener hears first. On the bass, Asus2 is the arpeggio A, E, A, B — root, 5th, root, 3rd — and that order is the shape to learn.
Treating it as a major chord. Asus2 has no 3rd, so it is neither major nor minor. If you add C# you have changed the chord entirely. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
Never resolving it. A sus2 that never moves can sound unfinished. Try resolving it to the major triad and listen to the 2nd settle into the 3rd. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
Muting the 2nd. The 2nd B is the whole point of this chord. If the string or key carrying it is muted, the chord is just root and 5th — a power chord. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
Where Asus2 is used
Asus2 is not a diatonic triad in any major or minor key, because it is an extended or altered chord, but its base triad belongs to the key of D major, the key of E major, the key of A major. an open, modern sound in pop, folk and worship music. As a dominant-type chord it also points toward D major, the key a perfect fourth above A, which is the tonic it most often resolves to. That is where Asus2 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the bass, Asus2 is the arpeggio A, E, A, B — root, 5th, root, 3rd — and that order is the shape to learn.
Because Asus2 is an extended or altered chord, it appears in progressions as a colour or a dominant rather than as a diatonic staple. Try it in place of the plain A triad in a progression you already know, and listen to how the extra notes change the feel — that substitution is the usual way extended chords enter real music. The Chord Progression Builder lets you try Asus2 in a progression in any key and hear how it connects to the chords around it. On the bass, play A, E, A, B and hear how the arpeggio spells out Asus2 without ever playing it as a block.
The same chord on other instruments is covered in Asus2 on guitar, Asus2 on piano, Asus2 on ukulele, and the scales that fit over it are the A major scale and the A minor pentatonic scale. Learning Asus2 on the bass and then checking it on another instrument is one of the best ways to fix the notes — A, B, E — in your memory, because the notes stay the same while everything else changes.
Practising Asus2
A short worked example makes Asus2 concrete. Play the four-chord progression D – A – Bm – G in D major, the key Asus2 most often resolves toward: D – A – Bm – G. Play each chord for one bar at a slow tempo, and listen to how Asus2 sounds in that sequence — whether it feels like home, like a lift, or like a chord on its way somewhere else. Then play the same four chords in a different order, starting on Asus2 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the bass, the arpeggio A, E, A, B outlines Asus2 one note at a time.
For a second exercise, play Asus2 and then the chord a fourth above A, back and forth, four times each. That move — a chord and the chord a fourth above it — is the most common resolution in Western music, and it is the move Asus2 is built for when it acts as a dominant. Finish by playing Asus2 on its own, slowly, and naming each note out loud as you play it: A, B, E. Naming the notes while you play them is what turns a shape into knowledge you can use in any key. Test yourself with the Practice Chord Quiz and keep time with the Metronome as the tempo rises. On the bass, the arpeggio A, E, A, B outlines Asus2 one note at a time.
Frequently asked questions
What does sus2 mean in Asus2?
Sus2 means the 3rd of the chord is suspended — replaced by the 2nd, B. The chord contains A, B, E, so the 2nd is the note that defines its sound. On the bass, the arpeggio above spells that note out one note at a time.
How do you resolve Asus2?
The usual resolution is down to the major triad: B moves to C#, the major 3rd. That small step from the 2nd to the 3rd is the classic sus2 resolution. On the bass, the arpeggio above spells that note out one note at a time.
How do you play Asus2 on the bass?
Outline it with the arpeggio A, E, A, B: root, 5th, root, 3rd. Play one note per beat, with the root A on beat one, and let each note ring. That arpeggio tells the listener exactly which chord is sounding, even though you never play all the notes of Asus2 at once.
What notes are in the Asus2 bass arpeggio?
The arpeggio is A, E, A, B. It starts on the root A, moves to the 5th E, returns to the root A and finishes on the 3rd B. Those four notes are the chord tones of Asus2, and playing them in that order is the standard way to outline the chord on bass.
Should you play the full Asus2 chord on bass?
Usually not. On bass the chord is outlined with the arpeggio A, E, A, B, not strummed as a block. Playing all the notes at once sounds muddy in the low register and hides the root, which is the note the rest of the band is listening for.