The A Major 7♯5 chord is a four-note chord made up of A, C♯, E♯, and G♯.
Construction
A Major 7♯5 = Root + Major 3rd + Minor 6th + Major 7th = A · C♯ · E♯ · G♯
| Note | Interval | Degree |
|---|---|---|
| A | Root | 1 |
| C♯ | Major 3rd | 3 |
| E♯ | Minor 6th | ♯5 |
| G♯ | Major 7th | 7 |
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 3 sharps (F♯, C♯, G♯).
F♯C♯G♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of A Major
These are the triads built on each degree of the A major scale:
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.