FCI
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b. 1
It seems that the dynamic markings modelling the figuration were not accidentally overlooked by Chopin in A; it was rather a conscious decision related to the general change of concept of the Prelude – see the note on the tempo indication. Chopin would often cross out such marks in autographs, e.g. in the Scherzo in B Minor, Op. 31, b. 334-349.
The same applies to the markings in b. 3-4 and 7 and 9.
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category imprint: Differences between sources
notation: Articulation, Accents, Hairpins