C-sharp major

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C major
Relative key A minor
enharmonic: B minor
Parallel key C minor
Dominant key G major
enharmonic: A major
Subdominant F major
Enharmonic D major
Component pitches
C, D, E, F, G, A, B, C

C major (or C-sharp major) is a major scale based on C, consisting of the pitches C, D, E, F, G, A, and B. Its key signature has seven sharps (see below: Scales and keys).

Its relative minor is A minor, and its parallel minor is C minor. Its enharmonic equivalent is D major.

A harp tuned to C-sharp major has all its pedals in the bottom position. Because all the strings are then pinched and shortened, this is the least resonant key for the instrument.

Although most composers prefer to use the enharmonic equivalent D-flat major because it has just five flats as opposed to the seven sharps of C-sharp major, Johann Sebastian Bach chose C-sharp major for Prelude and Fugue No. 3 in both books of the Well-Tempered Clavier. In Hungarian Rhapsody No. 6, Franz Liszt takes the unusual step of changing key from D-flat major to C-sharp major near the beginning of the piece. Maurice Ravel selected C-sharp major as the tonic key of Ondine from his piano suite Gaspard de la nuit. Erich Wolfgang Korngold composed his Piano Concerto for the Left Hand, Op. 17, in the key of C-sharp major.

Louis Vierne used C-sharp major for the "Dona Nobis Pacem" of the Agnus Dei of his Messe Solennelle in C sharp minor.


Ascending and descending C-sharp major scale.


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