Issues : Errors in GE
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b. 5
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composition: Op. 28 No. 17, Prelude in A♭ major
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The version of GE1 featuring f2 on the 3rd quaver is most probably a mistake of the engraver. In GE2 f2 was rightly changed to g2; at the same time, a cautionary category imprint: Differences between sources; Editorial revisions issues: Errors in GE , GE revisions |
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b. 5
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composition: Op. 28 No. 17, Prelude in A♭ major
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The missing a category imprint: Differences between sources issues: Errors in GE |
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b. 21
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composition: Op. 28 No. 17, Prelude in A♭ major
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In GE the top notes of the 3rd and 4th quavers were misplaced, i.e. a third too low (3rd quaver, g category imprint: Interpretations within context; Differences between sources issues: Errors in GE , Terzverschreibung error |
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b. 26
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composition: Op. 28 No. 17, Prelude in A♭ major
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In GE the bottom note of the 2nd L.H. quaver is an erroneous f. The mistake does not concern the natural present before that note, which is placed at the pitch of g. category imprint: Interpretations within context; Differences between sources issues: Errors in GE |
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b. 44-46
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composition: Op. 28 No. 17, Prelude in A♭ major
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In A (→FC,FE) accidentals were inserted very inaccurately – in total, 4 sharps and 12 naturals are missing – which, however, does not impede the determination of the correct text. Accidentals were being added in GE and EE, although it is only in EE2 that the notation is totally correct. The naturals before the b-b1 octave in b. 44 were also added in FED. category imprint: Interpretations within context; Differences between sources issues: Annotations in teaching copies , EE revisions , Annotations in FED , Accidentals in different octaves , Errors in GE , GE revisions , Omission of current key accidentals , Inaccuracies in A , Errors repeated in FE , Errors repeated in EE |
in 
notes in the chords in the 2nd half of the bar are a mistake of the engraver of 
-b
and 5 naturals are missing.