The A♯ 7sus4 chord is a four-note chord made up of A♯, D♯, E♯, and G♯. It is built from a root, perfect fourth, perfect fifth, and minor seventh.
Construction
A♯ 7sus4 = Root + Perfect 4th + Perfect 5th + Minor 7th = A♯ · D♯ · E♯ · G♯
| Note | Interval | Degree |
|---|---|---|
| A♯ | Root | 1 |
| D♯ | Perfect 4th | 11 |
| E♯ | Perfect 5th | 5 |
| G♯ | Minor 7th | ♭7 |
A♯ 7sus4 Inversions
| Position | Notes |
|---|---|
| Root Position | A♯ – D♯ – E♯ – G♯ |
| 1st Inversion | D♯ – E♯ – G♯ – A♯ |
| 2nd Inversion | E♯ – G♯ – A♯ – D♯ |
| 3rd Inversion | G♯ – A♯ – D♯ – E♯ |
Key Signature
A chord has no key signature of its own, but the A♯ 7sus4 is the tonic (I) chord of A# Major, whose key signature has 2 flats (B♭, E♭).
B♭E♭
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:
A♯ 7sus4 — Frequently Asked Questions
What is the A♯ 7sus4 chord on piano?
The A♯ 7sus4 chord contains the notes A♯ – D♯ – E♯ – G♯. On piano, play these notes together to sound the chord.
What notes are in the A# 7sus4 chord?
The A# 7sus4 chord (A#7sus4) contains 4 notes: A#, D#, F, G#. Formula: R-P4-P5-m7.
How is A#7sus4 used in music?
A#7sus4 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for A#7sus4?
A#7sus4 uses scale degrees 1-4-5-b7, giving it its distinctive sound.