The A♯ Dominant 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 minor seventh.
Construction
A♯ Dominant 7th = Root + Major 3rd + Perfect 5th + Minor 7th = A♯ · C♯♯ · E♯ · G♯
| Note | Interval | Degree |
|---|---|---|
| A♯ | Root | 1 |
| C♯♯ | Major 3rd | 3 |
| E♯ | Perfect 5th | 5 |
| G♯ | Minor 7th | ♭7 |
A♯ Dominant 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 dominant chord points home to the key a fifth below its root: the A♯ Dominant 7th is the V (dominant) of D# Major, so the relevant key signature is that key’s — 3 flats (B♭, E♭, A♭). Spelled as a scale, these notes are A# Mixolydian.
B♭E♭A♭
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 D♯ Major
These are the triads built on each degree of the D♯ major scale:
A♯ Dominant 7th — Frequently Asked Questions
What is the A♯ Dominant 7th chord on piano?
The A♯ Dominant 7th chord contains the notes A♯ – C♯♯ – E♯ – G♯. On piano, play these notes together to sound the chord.
What notes are in the A# Dominant 7th chord?
A# Dominant 7th is built from the A# root. Check the interactive keyboard above for exact notes and fingering.
How is the A# Dominant 7th chord used in music?
A# Dominant 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Dominant 7th).
What is the fingering for A# Dominant 7th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of A# Dominant 7th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.