Page:
Source:
p. 1, b. 1-14
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b. 1
In AT, AW and CDP, there is no cautionary flat before the 4th crotchet (b). It may mean that Chopin added the sign in [A], at the time of preparing the Etude for print, shortly before giving [A] for copying.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Cautionary accidentals
notation: Pitch
Missing markers on sources:
AT, AW, CDP, GC, FE1, FES, FED, FEJ, FE2, GE1, GE1a, GE2, GE3, EE1, EE2, EE3, GE1b