mUltimate Chopin

Op. 28 No. 17, Prelude in A♭ major

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Issues : Last key signature sign

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b. 37

composition: Op. 28 No. 17, Prelude in A♭ major

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The crossing-out of the D-d octave at the beginning of the bar, visible in A, suggests that moving the bass line in b. 37-40 an octave lower (with respect to the version of FCI) was an idea born in the process of writing A or fresh enough for Chopin to commit a mistake in the first of the lowered octaves. In A we can see a crossed-out  before the first d2 note in the R.H., which is an example of Chopin's uncertainty as to the key signature.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Bass register changes , Last key signature sign

b. 74

composition: Op. 28 No. 17, Prelude in A♭ major

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In the main text we omit the totally unjustified  (cautionary?) before d1, which, however, is present in all sources.

category imprint: Editorial revisions

issues: Cautionary accidentals , Last key signature sign