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Prelude and Fugue in C-sharp major,BWV 872, is a keyboard composition written byJohann Sebastian Bach. It is the thirdprelude and fugue in the second book ofThe Well-Tempered Clavier, a series of 48preludes andfugues in everymajor and minor key.
Theprelude is incommon time and has 50measures, built upon the characteristicarpeggios similar to thefamous C major prelude from the first book ofThe Well-Tempered Clavier until thefugato.[1]
The arpeggios ends atm. 25, and the fugato starts, which uses thetime signature of3
8. It has threevoices.[1]
Thefugue has three voices and 35 measures.[1] The subject is simply made from notes from themajor triad, but has mutated many times throughout the whole fugue.[2]