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Prelude and Fugue in C-sharp minor,BWV 873, is a keyboard composition written byJohann Sebastian Bach in 1738.[1] It is the 4thprelude and fugue in Book II ofThe Well-Tempered Clavier.
The prelude is in thetime signature of 9/8 time. It is in thekey ofC-sharp minor. The Prelude is heavilyornamented withmordents andappoggiaturas.[2]
The fugue is in 12/16 time. It is also in C-sharp minor. Unlike its prelude, the fugue does not have much ornamentation.[3]
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