The A5 bass chord is a power chord chord with the notes A, E. On bass it is outlined with the arpeggio A, E, A, E — 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 A5 chord?
The A5 chord is a power chord chord, and its notes are fixed: A, 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 A5 at a glance. On the bass, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
| Note | Interval |
|---|---|
| A | Root |
| 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 A5 are 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.
A5 sounds powerful, open and ambiguous — with no 3rd, the power chord is pure root and 5th, and it can fit over 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, E outlines A5 one note at a time.
Comparing A5 with its closest relatives helps to fix it in your ear. In short, power chord against a full triad: A5 has only A, E — root and 5th. Add the 3rd C# and it becomes major; add C and it becomes minor. Practise the two chords back to back and listen to the one note that changes — that single note is the difference between the two chords. On the bass, play A, E, A, E and hear how the arpeggio spells out A5 without ever playing it as a block.
How to play A5 on bass
On the bass, A5 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, E, which are the chord tones of A5 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 A5 by playing A on beat one, E on beat two, A on beat three and E on beat four, one note per beat, letting each note ring for its full value. Then play it backwards — E, 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 E colour the bar without pulling attention away from the root.
Once the straight arpeggio of A5 is comfortable, try playing just the root A and the 5th E for a whole bar, then add the 3rd E on the last beat as a passing colour. That root-and-5th skeleton is how most bass lines outline A5 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 A5 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.
Letting open strings ring. Open strings that are not part of the chord blur the sound. Mute them with the edge of your fretting hand. On the bass, the arpeggio A, E, A, E outlines A5 one note at a time.
Playing it too slowly. Power chords are about rhythm and movement. Practise changing them on the beat, not between beats. On the bass, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
Using it where a triad is needed. A5 has no 3rd, so it cannot carry the major-or-minor information a melody sometimes needs. Use full triads in clean, melodic passages. On the bass, play A, E, A, E and hear how the arpeggio spells out A5 without ever playing it as a block.
Playing the arpeggio as a chord. Strumming all the notes of A5 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, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
Where A5 is used
A5 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. a neutral chord that works over major or minor, since it contains no 3rd. 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 A5 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the bass, play A, E, A, E and hear how the arpeggio spells out A5 without ever playing it as a block.
Because A5 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 A5 in a progression in any key and hear how it connects to the chords around it. On the bass, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
The same chord on other instruments is covered in A5 on guitar, A5 on piano, A5 on ukulele, and the scales that fit over it are the A major scale and the A minor pentatonic scale. Learning A5 on the bass and then checking it on another instrument is one of the best ways to fix the notes — A, E — in your memory, because the notes stay the same while everything else changes.
Practising A5
A short worked example makes A5 concrete. Play the four-chord progression D – A – Bm – G in D major, the key A5 most often resolves toward: D – A – Bm – G. Play each chord for one bar at a slow tempo, and listen to how A5 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 A5 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the bass, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
For a second exercise, play A5 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 A5 is built for when it acts as a dominant. Finish by playing A5 on its own, slowly, and naming each note out loud as you play it: A, 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, A5 is the arpeggio A, E, A, E — root, 5th, root, 3rd — and that order is the shape to learn.
Frequently asked questions
Should you play the full A5 chord on bass?
Usually not. On bass the chord is outlined with the arpeggio A, E, A, E, 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.
Is A5 major or minor?
Neither. A5 contains only A, E — the root and the perfect 5th — so it has no 3rd to make it major or minor. That is why it works over both. On the bass, the arpeggio above shows where that note sits.
Why do rock guitarists use A5?
Through distortion, full triads sound muddy because the overtones clash. A power chord has only two notes, so it stays clear and punchy even with heavy distortion. On the bass, the arpeggio above shows where that note sits.
What notes are in A5?
Just two: A, E. The root A and the perfect 5th E. Some voicings add the root an octave higher, but the chord itself is only those two pitch classes. On the bass, the arpeggio above shows where that note sits.
How do you play A5 on the bass?
Outline it with the arpeggio A, E, A, E: 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 A5 at once.