'''C# sharp major''' is a [[major scale]] based on C# sharp, consisting of the pitches '''C# sharp''', D# sharp, '''E# sharp''' (enharmonic to F natural), F# sharp, '''G# sharp''', A# sharp, B# sharp (enharmonic to C natural) and '''C# sharp'''. Its [[key signature]] consists of seven sharps.
[[Image:C-sharp Major Scale.PNG|700px|Ascending and descending C-sharp Major Scale]]
Its [[relative key|relative minor]] is [[A- sharp minor]], and its [[parallel key|parallel minor]] is [[C- sharp minor]]. Its enharmonic equivalent is [[D- flat 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]] actually chose C- sharp major for Prelude and Fugue No. 3 in both books of the ''[[Well-Tempered Clavier]]''. [[Béla Bartók]]'s [[String Quartet No. 3 (Bartók)|String Quartet No. 3]] is one of the few in C- sharp major. In [[Hungarian Rhapsodies|Hungarian Rhapsody No. 6]], [[Franz Liszt]] actually changes 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]]''
