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Op. 28 No. 15, Prelude in D♭ major

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Rhythm

b. 4

composition: Op. 28 No. 15, Prelude in D♭ major

Quavers in A (→FE,FC→GE)

Semiquavers in EE
..

The change of quavers to semiquavers introduced by EE is right, as far as the rules of rhythmic notation are concerned. However, according to Chopin, the seemingly wrong original notation was most probably aimed at a calm, slightly slower performance of this figure. The same applies to b. 23.
See also b. 79 as well as the Prelude No. 18 in F Minor, b. 12, the Concerto in F Minor, Op. 21, 1st mov., b. 93 or the Nocturnes, Op. 9: No. 1 in B Minor, b. 73 and No. 2 in E Major, b. 16.

category imprint: Differences between sources

issues: EE revisions

b. 4

composition: Op. 28 No. 15, Prelude in D♭ major

..

In EE the minim c1 is mistakenly dotted.

category imprint: Interpretations within context; Differences between sources

issues: Errors in EE

b. 7

composition: Op. 28 No. 15, Prelude in D♭ major

Quaver a in A (→FC→GE, →FE→EE1)

Crotchet in EE2
..

Following in the footsteps of the reviser of EE2, in the main text we suggest adding an additional crotchet stem next to a in the 2nd half of the bar after analogous b. 3. In further analogous bars (b. 22 and 78) respective extensions are not to be found any more in A (both in the 1st and the 2nd halves of the bar). Marking the first appearance of a given phrase in a more accurate manner was Chopin's frequent practice, hence the absence of those stems does not have to be considered an oversight. However, in the case of such single details, yet important for the sonic atmosphere, recurring at significant intervals, we consider it right to add the omitted elements of notation.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions

b. 19

composition: Op. 28 No. 15, Prelude in D♭ major

Crotchet g in A (→FC)

No crotchets in FE (→EE1) & GE

Crotchets g & a in FED, FES & EE2
..

The stem prolonging the g quaver was overlooked both in FE (→EE1) and GE). Chopin added it in FED and FES; moreover, in both copies he also prolonged the last a quaver. We consider that addition, most probably introduced independently in each of the copies, a development of the original idea and adopt it to the main text.
It remains a mystery how the reviser of EE2 found out about those prolonged notes. 

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED , Errors in GE , Annotations in FES

b. 22

composition: Op. 28 No. 15, Prelude in D♭ major

No extra a crotchets in A (→FC→GE, →FE→EE1)

Additional crotchet in EE2

2 additional crotchets suggested by the editors
..

In the main text we mark the use of "harmonic legato" in the L.H. part, as Chopin did in b. 3. The first a note was also prolonged in EE2.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions