Ab Majeur Accord

A bright, happy triad built from a root, major third, and perfect fifth.

Ab Accord — Quick Answer & Harmonic Definition

The Ab (Major) chord consists of the notes Ab, C, Eb. It is constructed from the root note Ab using the major interval formula (0–4–7 semitones).

Formula: 0 – 4 – 7

Notes

Ab – C – Eb

Intervals (semitones)

0 – 4 – 7

Type

Triad

Ab on Piano

Press highlighted keys simultaneously to play the Ab chord.

G# (Root (R))

C (Major 3rd)

D# (Perfect 5th)

Ab on Guitar

Fret numbers (low E → high e string): 466544 (x=mute, 0=open)

Interval Analysis

Degree	Interval Name	Semitones	Note in G#
Root	Root (R)	0	G#
3rd	Major 3rd	4	C
5th	Perfect 5th	7	D#

About the Ab Majeur Chord

The Ab chord (Ab Majeur) consists of 3 notes: G#, C, D#. A bright, happy triad built from a root, major third, and perfect fifth.

To build any major chord, apply intervals of 0, 4, 7 semitones above the root. Starting from G#: the notes land on G#, C, D#.

Playing Ab on Piano

Press G#, C, D# simultaneously. In root position, G# is lowest. First inversion places C in the bass for a lighter sound; second inversion uses D# as the bass note.

Common Chord Progressions Using Ab

I–IV–V: Ab – C# – D# (blues and rock)
I–V–vi–IV: Ab – D# – Fm – C# (pop staple)
I–vi–IV–V: Ab – Fm – C# – D# (50s progression)

The Ab Chord in Context

As a major chord, Ab serves as the tonic (I) in the key of G# major. It also appears as the IV chord in D# major, and as the V chord in C# major — making it one of the foundational primary triads in Western harmony.

Other G# Chords

Majeur Chord in All 12 Keys

C C# D D# E F F# G G# A A# B

Knowledge Base & FAQs

Ab Chord — Frequently Asked Questions

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What notes are in the Ab chord?

The Ab Majeur chord contains: G#, C, D#.

These notes are derived by applying the major interval formula (0–4–7 semitones) to the root note G#.

What is the Ab chord used for?

A bright, happy triad built from a root, major third, and perfect fifth.

The Ab chord is used across pop, rock, jazz, and classical music. As the I chord in the key of G# major, it functions as the most stable resting point in progressions.

How do you play Ab on piano?

On piano, play G#, C, D# simultaneously.

In root position, G# is the lowest note. Inversions move the bass note up — first inversion has C lowest, second inversion has D# lowest.

How many notes are in a major chord?

A major chord has 3 notes: G#, C, D# (in G#).

It is a triad — the most fundamental chord type.

What is the difference between G# major and G# minor?

The G# major chord (G#–C–D#) uses a major third (4 semitones), giving it a bright, happy sound.

The G# minor chord (G#–B–D#) uses a minor third (3 semitones), giving it a darker, emotional sound.

What key does Ab belong to?

Ab naturally serves as the I chord in the key of G# major.

It also appears as IV in the key of D# major, and as V in the key of C# major.

Can I play Ab on ukulele?

Yes.

The ukulele uses GCEA tuning with 4 strings. The Ab chord notes (G#, C, D#) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

What chords go well with Ab?

In the key of G# major, Ab pairs naturally with C# major (IV), D# major (V), and Fm (vi).

The classic I–IV–V (Ab–C#–D#) is the foundation of blues, country, and rock.

What is a chord inversion of Ab?

An inversion places a non-root note in the bass.

Ab root position: G# in bass. First inversion: C in bass. Second inversion: D# in bass. Inversions create smoother bass line movement without changing the harmony.

How do I memorize the notes in a major chord?

Remember the formula: 0–4–7 semitones from root.

For Ab: start on G#, add 4 semitones, then 7 semitones. Practicing this across all 12 roots builds instant recognition of any major chord.