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Rhythm

b. 1

composition: Op. 28 No. 16, Prelude in B♭ minor

 in A (→FCGE)

 in FE (→EE)

..

The change of time signature in FE probably resulted from the engraver's inattention. In Chopin's pieces, it was common that engravers did not differentiate between  and , see the Prelude No. 14 in E Minor.

category imprint: Differences between sources

issues: Errors in FE , 4/4 or 2/2