The C♯ Major 7♯5 chord is a four-note chord made up of C♯, E♯, G♯♯, and B♯.
Construction
C♯ Major 7♯5 = Root + Major 3rd + Minor 6th + Major 7th = C♯ · E♯ · G♯♯ · B♯
| Note | Interval | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E♯ | Major 3rd | 3 |
| G♯♯ | Minor 6th | ♯5 |
| B♯ | Major 7th | 7 |
Key Signature
A chord has no key signature of its own, but the C♯ Major 7♯5 is the tonic (I) chord of C# Major, whose key signature has 7 sharps (F♯, C♯, G♯, D♯, A♯, E♯, B♯).
F♯C♯G♯D♯A♯E♯B♯
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 C♯ Major
These are the triads built on each degree of the C♯ major scale:
C♯ Major 7♯5 — Frequently Asked Questions
What is the C♯ Major 7♯5 chord on piano?
The C♯ Major 7♯5 chord contains the notes C♯ – E♯ – G♯♯ – B♯. On piano, play these notes together to sound the chord.