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New Released in April 2026

A Flat Augmented Chord on Piano (Abaug)

The A flat augmented chord (Abaug) on the piano has three notes: Ab, C, E. It is a major triad with a raised fifth, formula 1 3 #5, built from two major thirds. Below: the keyboard, the three positions, how it compares with Ab and Abm, and where it goes next.

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Abaug Ab C E

How to play Abaug on the piano

Move the lowest note up an octave to reach the next position.

Abaug Ab C E

Root position: Ab C E

Abaug C E Ab

1st inversion: C E Ab

Abaug E Ab C

2nd inversion: E Ab C

Root position: starts on Ab, a black key; black keys: Ab
1st inversion: starts on C, a white key; black keys: Ab
2nd inversion: starts on E, a white key; black keys: Ab

What makes Abaug different

Same root, same third or fifth moved by a semitone.

Chord	Notes	Third	Fifth
Ab	Ab C Eb	major 3rd	perfect 5th
Abm	Ab Cb Eb	minor 3rd	perfect 5th
Abdim	Ab Cb Ebb	minor 3rd	diminished 5th
Abaug	Ab C E	major 3rd	augmented 5th

Where Abaug goes

Abaug is the III+ chord in the harmonic minor scale of F minor.
Its thirds are equal, so Abaug, Caug and Eaug use the same three keys: the root is whichever note you treat as home.
A common move is Ab → Abaug → Db: the raised fifth E pushes up to E#.

Db · Ab

ChordRunner showing a chord block while hands play the piano

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ChordRunner mixes Abaug with the chords around it and checks every note you play. MIDI keyboard or microphone, both work.

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All piano chords · Augmented chords explained

Common questions

What notes are in the A flat augmented chord?

Abaug has three notes: Ab, C, E. Root, major 3rd and augmented 5th (formula 1 3 #5).

What is the difference between Abaug and Ab?

One note. Ab has Eb on top; Abaug moves it to E. The new fifth is what gives Abaug its floating, unresolved sound.

Where does Abaug go?

Abaug is the III+ chord in the harmonic minor scale of F minor. Its thirds are equal, so Abaug, Caug and Eaug use the same three keys: the root is whichever note you treat as home.

Can I practise Abaug with a MIDI keyboard or microphone?

Yes. ChordRunner detects a USB MIDI keyboard automatically and also hears an acoustic piano through the microphone. Abaug counts in any position, as long as Ab, C, E sound together.

Your instrument is the controller.

ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.

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A Flat Augmented Chord on Piano (Abaug)

How to play Abaug on the piano

What makes Abaug different

Where Abaug goes

Train Abaug in a game

Common questions

What notes are in the A flat augmented chord?

What is the difference between Abaug and Ab?

Where does Abaug go?

Can I practise Abaug with a MIDI keyboard or microphone?

Your instrument is the controller.

Keep learning

A Flat Major Chord on Piano (Ab)

A Flat Minor Chord on Piano (Abm)

A Flat Diminished Chord on Piano (Abdim)

Augmented Chords Explained

Piano Chord Chart: Every Chord in All 12 Keys

Chord Training That Feels Like a Game