Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 33

composition: Op. 10 No 7, Etude in C major

Crotchet g in A

No crotchet in FE (→GE,EE)

..

Omission of the additional stem extending in FE (→GE,EE) is probably a result of the engraver's distraction.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 33

composition: Op. 10 No 7, Etude in C major

e1 in A

d1 in FE (→GE,EE)

..

While proofreading FE (→GE,EE), Chopin changed the notation of the bottom note of the 5th and 6th semiquavers from e1 to d1. At the same time, he did not realise that after the change, a  returning d1 in the last pair of semiquavers should be added. The mistake was corrected in GE and EE4.

category imprint: Differences between sources; Corrections & alterations

issues: EE revisions , Errors in FE , Omissions to cancel alteration , GE revisions , Enharmonic corrections , Authentic corrections of FE

b. 33

composition: Op. 10 No 7, Etude in C major

..

We add a cautionary  before c1. The accidental is already present in GE2 (→GE3GE4) and EE4.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 33-43

composition: Op. 10 No 7, Etude in C major

No slurs in A (→FEGE,EE3)

11 slurs in EE4

..

The whole-bar long slurs are an arbitrary addition of the reviser of EE4. Cf. bars 5-14.

category imprint: Differences between sources

issues: EE revisions

b. 34-48

composition: Op. 10 No 7, Etude in C major

..

In bars 34-35 and 48 in A there are characteristic extended stems next to c1 notes in the part of the R.H. written in the treble clef (in the L.H. the effect is noticeable also in the notation of the grace note at the beginning of bar 38). In another context they could have been considered as additional crotchets, which was very frequent in Chopin's works, cf., e.g., the Mazurka in Bminor, Op. 24 No. 4, bar 23.

category imprint: Source & stylistic information

issues: Uncertain notes on ledger lines