mUltimate Chopin

Op. 28 No. 21, Prelude in B♭ major

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Pitch

b. 23

composition: Op. 28 No. 21, Prelude in B♭ major

c2-a2-c3 twice in A (→FE→EE), contextual interpretation

c2-c3 twice in FC (→GE1)

d2-d3 & c2-c3 in GE2 (→GE3)
..

In the main text we give the version of A (→FE→EE), which does not raise any doubts, in spite of the missing  lowering a2 to a2 (it was added in EE). In the notation of FC, perhaps intentionally compliant with A, the middle notes (a2) in the grace note and the following crotchet are, however, completely imperceptible, hence they were not printed in GE1. The version of GE2 (→GE3) is an arbitrary revision; originally, it was modelled after the authentic version of b. 31, yet it was implemented inattentively – the change of pitch of the grace note made the following crotchet lose the flats lowering c2-c3 to c2-c3, which should have been added in that situation.

category imprint: Graphic ambiguousness; Interpretations within context; Differences between sources

issues: EE revisions , Errors in GE , GE revisions , Omission of current key accidentals , Errors of A , Errors repeated in FE

b. 28

composition: Op. 28 No. 21, Prelude in B♭ major

..

In the sources there is no  lowering d1 to d1. Chopin's attention was caught by the beginning of the bar – he removed g1 from the 1st quaver; he also crossed out the second one and rewrote it next to it. 

category imprint: Interpretations within context; Editorial revisions

issues: Omission of current key accidentals , Inaccuracies in A , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE

b. 28

composition: Op. 28 No. 21, Prelude in B♭ major

..

In the notation of A (→FC), reproduced by us in the main text, in which g1 on the 5th quaver is on the top stave, this note does not require an accidental. In the editions it was moved to the bottom stave, yet it was only GE and EE that added the necessary flat.

category imprint: Differences between sources

issues: EE revisions , Errors in FE

b. 31

composition: Op. 28 No. 21, Prelude in B♭ major

..

In A (→FE,FC→GE1) there is no  lowering a2 to a2. The accidental was added in EE and GE2. In addition, EE1 overlooked the  lowering g2 to g2, which was corrected in EE2.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in EE , GE revisions , Omission of current key accidentals , Errors of A , Errors repeated in FE

b. 31

composition: Op. 28 No. 21, Prelude in B♭ major

..

In A Chopin crossed out the  before b2 in the grace note.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Cautionary accidentals , Deletions in A