Chord C# Major

On the piano, the notes of C# are C#, E# and G#. C# is the root, E# the major third and G# the fifth. Said aloud, its notes are C sharp, E sharp and G sharp. C# uses two black keys, C# and G#, and one white key, E#.

The gaps in C# are not equal. C# to E# is four and E# to G# is three semitones. The frequencies in this position are C#4 at 277.18 Hz, E#4 at 349.23 Hz and G#4 at 415.3 Hz, with A4 tuned to 440 Hz.

Your right hand plays C# with the thumb, E# with the index finger and G# with the ring finger. From C#4 to G#4 the hand spans seven semitones.

In the first inversion, C# moves up an octave and the lowest note becomes E#, the major third. The fingers are 1 - 2 - 5. In the second inversion, E# moves up an octave and the lowest note becomes G#, the fifth. The fingers are 1 - 3 - 5.

Move E# in C# down a semitone, to E, and you have C#m.

C# shows up in seven keys. In C# major it is the I, in F# major the V and in G# major the IV.