Abadd11

Q: What notes are in the Abadd11 chord?

The Abadd11 chord (Ab Add11) contains: Ab, C, Eb, Db. Its interval structure is shown above in the Theory section.

Q: How do I build Abadd11 on the keyboard?

Take the root and add the remaining chord tones following the interval formula. The highlight shows chord content, while the inversion control changes which chord tone is in the bass.

Q: Which keys is Abadd11 found in?

The chord acts as a diatonic degree in several keys — they are marked on the circle of fifths in the "Harmonic context" block.

Q: What can I substitute for Abadd11?

A substitution depends on harmonic function and voice leading, not only on shared tones. Computed options appear in the "Substitutions" block and should be checked in context.

Ab Add11

Octaves

Musical context

ChordAb majorTriad

ChordAbadd11Ab Add11

ArpeggioAb majorBroken triad

ScaleAb major7 notes

KeyAb majorMajor key

ProgressionPop axisSequence

How the chord relates to the scale, mode, key and progression.

Theory

General info

Full name: Ab Add11
Symbol: Abadd11
Root: Ab
Quality: Add11

Chord notes

1Abroot

3Cmajor 3rd

5Ebperfect 5th

4Dbperfect 4th

Functions & resolutions

Typical function in key: VDominant (V)C# major
Stability / tension: Stable — can serve as major tonic
Most common resolutions: DbDb Major EbEb Major FmF Minor
Main resolution: Abadd11source
EbEb Major
Major chord Ab is a stable tonic. As tonic it doesn't require resolution, but in a progression context typically moves to IV or V.
Other resolutions: Abadd11source
Deceptive resolution
FmF Minor
As the V degree, a major chord can defy expectations by moving to vi instead of I (deceptive cadence).
Abadd11source
Modal resolution
GbGb Major
In modal context, a major chord can freely move to bVII, bIII, or bVI — characteristic of Mixolydian mode.
Abadd11source
Jazz reharmonization
Abmaj7Ab Major 7
In jazz, a major chord is enriched to maj7, 6/9, or add9 and can smoothly transition into a ii-V of another key (modulation).
Abadd11source
Functional resolution
EbEb Major
As the IV degree (subdominant), a major chord can resolve to V or directly to I (plagal cadence).

Features

Character: Major, with an added 11th and no 7th
Characteristic interval: Perfect 11th without 7th (add11)
Description: A perfect 11th is added to a major triad without a 7th. The 3rd and 11th form a semitone dissonance that may be featured as a cluster or separated by register.
Application: Clustered major textures
Pedal sonorities
Modern popular harmony

Voicing & structure

Root position

v1Ab(Ab4)Bass

root

v2C(C5)M3from Ab

v3Eb(Eb5)m3from C

v4Db(Db6)m7from Eb

Harmony

Compatible scales

All chord tones are contained in these scales — use them for improvisation.

ScaleC Phrygian ScaleC Locrian ScaleC Neapolitan minor ScaleC Altered (super Locrian)ScaleC# Ionian (major)ScaleC# Lydian ScaleC# Harmonic minor ScaleC# Melodic minor ScaleC# Hungarian minor ScaleC# Harmonic major

This chord on guitar 🎸

See how Abadd11 looks on guitar.

Explore

Circle of fifths

Highlighted major keys contain this chord among their diatonic harmonies.

Relative key: FmF minor
Dominant: EbEb major
Subdominant: DbDb major
Key signature: 4 flats (Bb, Eb, Ab, Db)

What to learn next

ScaleAb Ionian (major)Scale to improvise over this chord PracticeChord trainerLock the fingering into muscle memory ProgressionChord progressionsHow this chord works inside real progressions

Recommended for you

Ab Ionian (major)A scale related to this chord

Ab MixolydianA scale related to this chord

Ab Chromatic scaleA scale related to this chord

Ab ByzantineA scale related to this chord

Practice

Keyboard Trainer

Reinforce it in practice — play and name notes on the interactive keyboard.

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Test yourself

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What notes are in the Abadd11 chord?

How do I build Abadd11 on the keyboard?

Which keys is Abadd11 found in?

What can I substitute for Abadd11?