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Pitch

b. 32

composition: Op. 28 No. 13, Prelude in F♯ major

b1 in A (→FCGE, →FEEE)

a1 in FES

..

A comparison with analogous b. 16 reveals that the b1 note present in the manuscripts and editions is probably Chopin's lapsus calami – he wrote here a note that was supposed to be in the next chord (cf., the Ballades in G Minor, Op. 23, b. 193 and in F Major, Op. 38, b. 173). Due to the above reason, we consider the correction of that note in FES to a1 (definitely coming from Chopin) to be a correction of the mistake and include it in the main text. 

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors of A , Annotations in FES