FE1
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b. 38
The missing raising a to a is almost certainly Chopin's oversight – in the entire A accidentals are generally valid in all octaves (cf. bar 10 and dozens of examples in mov. I and IV). The accidental was added in GE (→FE,EE,IE).
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: GE revisions
notation: Pitch