A#6sus4

Q: What notes are in the A#6sus4 chord?

The A#6sus4 chord (A# 6sus4) contains: A#, D#, E#, G. Its interval structure is shown above in the Theory section.

Q: How do I build A#6sus4 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 A#6sus4 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 A#6sus4?

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.

A# 6sus4

Octaves

Musical context

ChordA#6sus4A# 6sus4

ArpeggioA# majorBroken triad

ScaleA# major7 notes

KeyA# majorMajor key

ProgressionPop axisSequence

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

Theory

General info

Full name: A# 6sus4
Symbol: A#6sus4
Root: A#
Quality: 6sus4

Chord notes

1A#root

4D#perfect 4th

5E#perfect 5th

6Gmajor 6th

Functions & resolutions

Typical function in key: VDominant (V)Eb major
Stability / tension: Stable — can serve as major tonic
Most common resolutions: D#D# Major FF Major GmG Minor
Main resolution: A#6sus4source
FF Major
Major chord A# is a stable tonic. As tonic it doesn't require resolution, but in a progression context typically moves to IV or V.
Other resolutions: A#6sus4source
Deceptive resolution
GmG Minor
As the V degree, a major chord can defy expectations by moving to vi instead of I (deceptive cadence).
A#6sus4source
Modal resolution
G#G# Major
In modal context, a major chord can freely move to bVII, bIII, or bVI — characteristic of Mixolydian mode.
A#6sus4source
Jazz reharmonization
A#maj7A# 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).
A#6sus4source
Functional resolution
FF Major
As the IV degree (subdominant), a major chord can resolve to V or directly to I (plagal cadence).

Features

Character: No 3rd, with a 4th and major 6th
Characteristic interval: 4th instead of 3rd (4), Major 6th (6)
Description: The 4th replaces the 3rd, leaving chord quality undefined; the major 6th adds a consonant extension. A possible 4–3 motion turns the chord into a 6 chord.
Application: Suspension before a 6 chord
Modal sonorities
Pedal bass

Voicing & structure

Root position

v1A#(A#4)Bass

root

v2D#(D#5)P4from A#

v3E#(E#5)M2from D#

v4G(G5)M2from E#

Harmony

Compatible scales

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

ScaleD# Major pentatonic ScaleA# Yo (Japanese)ScaleC Minor pentatonic ScaleC Blues scale ScaleD# Ionian (major)ScaleD# Lydian ScaleD# Mixolydian ScaleD# Mixolydian ♭6 ScaleD# Harmonic major ScaleF Dorian

This chord on guitar 🎸

See how A#6sus4 looks on guitar.

Explore

Circle of fifths

Highlighted major keys contain this chord among their diatonic harmonies.

Relative key: GmG minor
Dominant: FF major
Subdominant: EbEb major
Key signature: 2 flats (Bb, Eb)

What to learn next

ScaleBb 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

Bb Ionian (major)A scale related to this chord

Bb DorianA scale related to this chord

Bb MixolydianA scale related to this chord

Bb Chromatic scaleA 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 A#6sus4 chord?

How do I build A#6sus4 on the keyboard?

Which keys is A#6sus4 found in?

What can I substitute for A#6sus4?