Construction
A♯ Major 13th = Root + Major 3rd + Perfect 5th + Major 7th + Major 2nd + Perfect 4th + Major 6th = A♯, C♯♯, E♯, G♯♯, B♯, D♯, F♯♯
| Note | Interval | Degree |
|---|---|---|
| A♯ | Root | 1 |
| C♯♯ | Major 3rd | 3 |
| E♯ | Perfect 5th | 5 |
| G♯♯ | Major 7th | 7 |
| B♯ | Major 2nd | 9 |
| D♯ | Perfect 4th | 11 |
| F♯♯ | Major 6th | 13 |
Key Signature
A chord has no key signature of its own, but the A♯ Major 13th 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 A♯ Major:
Scales That Include the A♯ Major 13th
- Bb Major (I)
- G Minor (III)
- C Dorian (VII)
- D Phrygian (VI)
- Eb Lydian (V)
- F Mixolydian (IV)
- G Aeolian (III)
- A Locrian (II)
Same Notes, Other Names
The notes A♯ – C♯♯ – E♯ – G♯♯ – B♯ – D♯ – F♯♯ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell the following:
A♯ Major 13th : Frequently Asked Questions
What is the A♯ Major 13th chord on piano?
The A♯ Major 13th chord contains the notes A♯ – C♯♯ – E♯ – G♯♯ – B♯ – D♯ – F♯♯. On piano, play these notes together to sound the chord.
What is the A# piano chord?
The A# piano chord (written A♯ Major 13th) uses the same keys: A♯ – C♯♯ – E♯ – G♯♯ – B♯ – D♯ – F♯♯. The # and ♯ symbols name the same black key.
What notes are in the A# Major 13th chord?
A# Major 13th is built from the A# root. Check the interactive keyboard above for exact notes and fingering.
How is the A# Major 13th chord used in music?
A# Major 13th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Major 13th).
What is the fingering for A# Major 13th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of A# Major 13th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.