Construction
A♯ Major 7♭5 = Root + Major 3rd + Diminished 5th + Major 7th = A♯, C♯♯, E, G♯♯
| Note | Interval | Degree |
|---|---|---|
| A♯ | Root | 1 |
| C♯♯ | Major 3rd | 3 |
| E | Diminished 5th | ♭5 |
| G♯♯ | Major 7th | 7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| A♯ | black | index finger (2) | little finger (5) |
| C♯♯ | white | middle finger (3) | ring finger (4) |
| E | white | ring finger (4) | middle finger (3) |
| G♯♯ | white | little finger (5) | index finger (2) |
Right hand: index finger (2) on A♯, middle finger (3) on C♯♯, ring finger (4) on E, little finger (5) on G♯♯.
Left hand: little finger (5) on A♯, ring finger (4) on C♯♯, middle finger (3) on E, index finger (2) on G♯♯.
Key Signature
A chord has no key signature of its own, but the A♯ Major 7♭5 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:
A♯ Major 7♭5 : Frequently Asked Questions
What is the A♯ Major 7♭5 chord on piano?
The A♯ Major 7♭5 chord contains the notes A♯ – C♯♯ – E – G♯♯. On piano, play these notes together to sound the chord.
What is the A# piano chord?
The A# piano chord (written A♯ Major 7♭5) uses the same keys: A♯ – C♯♯ – E – G♯♯. The # and ♯ symbols name the same black key.