Construction
C♯ Major 7♯11 = Root + Major 3rd + Diminished 5th + Perfect 5th + Major 7th = C♯, E♯, F♯♯, G♯, B♯
| Note | Interval | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E♯ | Major 3rd | 3 |
| F♯♯ | Diminished 5th | ♭5 |
| G♯ | Perfect 5th | 5 |
| B♯ | Major 7th | 7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| C♯ | black | thumb (1) | little finger (5) |
| E♯ | white | index finger (2) | ring finger (4) |
| F♯♯ | white | middle finger (3) | middle finger (3) |
| G♯ | black | ring finger (4) | index finger (2) |
| B♯ | white | little finger (5) | thumb (1) |
Right hand: thumb (1) on C♯, index finger (2) on E♯, middle finger (3) on F♯♯, ring finger (4) on G♯, little finger (5) on B♯.
Left hand: little finger (5) on C♯, ring finger (4) on E♯, middle finger (3) on F♯♯, index finger (2) on G♯, thumb (1) on B♯.
Key Signature
A chord has no key signature of its own, but the C♯ Major 7♯11 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 C♯ Major:
C♯ Major 7♯11 : Frequently Asked Questions
What is the C♯ Major 7♯11 chord on piano?
The C♯ Major 7♯11 chord contains the notes C♯ – E♯ – F♯♯ – G♯ – B♯. On piano, play these notes together to sound the chord.
What is the C# piano chord?
The C# piano chord (written C♯ Major 7♯11) uses the same keys: C♯ – E♯ – F♯♯ – G♯ – B♯. The # and ♯ symbols name the same black key.