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A♭ Augmented Chord: Guitar, Piano and Notes

The A♭ Augmented chord is built on the root note A♭. Its notes are A♭, C and E. It's enharmonically the same chord as G♯ Augmented.

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Quality
Short answer

Augmented chords feel floaty and uncertain. Raising the fifth of a major triad creates a symmetrical chord with no clear home, which suits transitions and dreamy film score moments.

Notes
A♭ · C · E
Formula
1 · 3 · ♯5
Semitones
0 · 4 · 8
Note
A♭
Quality
Augmented
Symbol
A♭+

A♭ Augmented on piano

3 notes
View:
Piano diagram of the A♭ Augmented chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play A♭ Augmented on piano, place your right hand with your thumb on A♭, middle finger on C and little finger on E. Press the keys together and listen for an even sound. On the keyboard A♭ is a black key and C and E are white. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard. Practice moving in and out of the chord slowly, then bring in a metronome.

  • A♭1
  • C3
  • E♯5

A♭ Augmented on guitar

View:
Guitar chord diagram of the A♭ Augmented chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, A♭ Augmented is commonly played with the voicing shown above. This one is a barre at fret 4: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them.

A♭ · C · E

Try A♭ Augmented on the virtual piano

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A♭ Augmented chord notes

Also known as G♯ Augmented

DegreeIntervalSemitonesNoteHear
1Root0A♭(Ab)
3Major third4C
♯5Augmented fifth8E

How to use the A♭ Augmented chord

The A♭ Augmented chord is built from a root, a major third and an augmented fifth. Start at the root A♭ and stack the intervals to get the whole chord: A♭, C and E. The same formula gives you the chord in any other key.

Augmented chords show up in jazz, bossa nova, film scores and psychedelic rock. They're often used as a brief transition chord, for example between I and vi in a major key.

How A♭ Augmented differs from similar chords

A♭+ raises the fifth of A♭ by a half step, so it stacks two major thirds and has no perfect fifth at all. That makes it the mirror image of A♭°, which stacks two minor thirds. Because three major thirds split the octave evenly, the same three notes form an augmented chord on each of them.

Where A♭ Augmented is used

An augmented chord is unstable by construction: it turns up as a passing tonic inside a descending line, and as a dominant sharpened to pull harder.

In a descending line clichéA♭ major
  1. IA♭
  2. I+A♭+
  3. viFm
  4. IVD♭

The descending line cliché: the fifth of the tonic rises a semitone, then falls into the third of the vi.

As an altered dominantD♭ major
  1. V+A♭+
  2. ID♭

Raising the fifth of the dominant sharpens its pull into D♭.

Scales that contain A♭+

These scales include A♭+ as one of their diatonic chords. Use them to find melodies and improvisation ideas that fit perfectly.

Questions people ask

What notes are in the A♭ Augmented chord?
The A♭ Augmented chord contains A♭, C and E (Ab, C and E in plain text).
Is the A♭ Augmented chord major or minor?
A♭ Augmented is a augmented chord. Augmented chords feel floaty and uncertain. Raising the fifth of a major triad creates a symmetrical chord with no clear home, which suits transitions and dreamy film score moments.
How do you play A♭ Augmented on piano?
Place your fingers on A♭, C and E and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard A♭ is a black key and C and E are white. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard.
How do you play A♭ Augmented on guitar?
Use the fingering in the diagram above. This one is a barre at fret 4: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them.
What is another name for the A♭ Augmented chord?
A♭ Augmented is enharmonically equivalent to G♯ Augmented. Both chord names describe exactly the same notes, but the spelling depends on the key you are playing in.