The A♭ Major 7th chord is a four-note chord made up of A♭, C, E♭, and G. It is built from a root, major third, perfect fifth, and major seventh.
Construction
A♭ Major 7th = Root + Major 3rd + Perfect 5th + Major 7th = A♭ · C · E♭ · G
| Note | Interval | Degree |
|---|---|---|
| A♭ | Root | 1 |
| C | Major 3rd | 3 |
| E♭ | Perfect 5th | 5 |
| G | Major 7th | 7 |
A♭ Major 7th Inversions
| Position | Notes |
|---|---|
| Root Position | A♭ – C – E♭ – G |
| 1st Inversion | C – E♭ – G – A♭ |
| 2nd Inversion | E♭ – G – A♭ – C |
| 3rd Inversion | G – A♭ – C – E♭ |
Key Signature
A chord has no key signature of its own, but the A♭ Major 7th is the tonic (I) chord of Ab Major, whose key signature has 4 flats (B♭, E♭, A♭, D♭).
B♭E♭A♭D♭
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
B♭E♭A♭D♭G♭C♭F♭
Mnemonic: Battle Ends And Down Goes Charles’ Father
Chords in the Key of A♭ Major
These are the triads built on each degree of the A♭ major scale:
How A♭ Major 7th functions in a key
The same chord takes on a different harmonic role depending on the key it appears in. Here is where A♭ Major 7th sits diatonically across the common keys:
- In A♭ major, A♭ Major 7th is the I chord — the tonic.
- In C minor, A♭ Major 7th is the VI chord — the tonic.
- In E♭ major, A♭ Major 7th is the IV chord — a predominant.
- In F minor, A♭ Major 7th is the III chord — a mediant / color chord.
A♭ Major 7th — Frequently Asked Questions
What is the A♭ Major 7th chord on piano?
The A♭ Major 7th chord contains the notes A♭ – C – E♭ – G. On piano, play these notes together to sound the chord.
What notes are in the Ab Major 7th chord?
The Ab Major 7th chord (Abmaj7) contains four notes: Ab (root), C (major third), Eb (perfect fifth), and G (major seventh). The major seventh gives this chord its warm, lush, sophisticated quality.
How does Ab Major 7th differ from Ab Dominant 7th?
Both contain Ab, C, and Eb. The difference is the seventh: Abmaj7 has G (major seventh) while Ab7 has Gb (minor seventh). Abmaj7 sounds warm and resolved; Ab7 sounds tense and pulls toward Db Major.
How is Ab Major 7th used in music?
Abmaj7 is the I chord in jazz harmony in Ab Major. Ab is a beloved key for vocalists and R&B — Abmaj7 appears frequently in soul, gospel, neo-soul, and jazz ballads. It is also the IV chord in Eb Major, another common jazz key.
What genres commonly use Major 7th chords?
Major 7th chords are foundational in jazz, bossa nova, neo-soul, R&B, city pop, and lo-fi hip-hop. They also appear in classical impressionism and sophisticated pop. The lush quality is a signature of harmonically rich music.
What songs use Major 7th chords?
Major 7th chords appear in The Girl from Ipanema (Jobim), Don't Know Why (Norah Jones), and countless jazz standards. Stevie Wonder's catalogue is filled with major 7th voicings. Abmaj7 is especially common in R&B and gospel contexts.
Can I substitute Ab Major 7th for Ab Major?
Yes — Abmaj7 can replace Ab Major for richer harmony. The exception is when the melody sits on Ab, since the G–Ab semitone can clash. In R&B and neo-soul, this substitution is almost expected.