Issues : Omissions to cancel alteration

b. 42

composition: Op. 10 No 4, Etude in C♯ minor

..

In the sources there is no  returning fat the penultimate semiquaver. Due to the unquestioned f1 in the R.H., lack of this sign must be considered as a patent error.

category imprint: Interpretations within context; Editorial revisions

issues: Omissions to cancel alteration

b. 46

composition: Op. 10 No 4, Etude in C♯ minor

..

In AI there are no naturals before the 4th and 12th semiquavers (in both hands). The signs in the 1st half of the bar are of cautionary significance, yet in the 2nd half of the bar they are necessary. Moreover, the  lowering d1 to dwas omitted. All the aforementioned signs appear in FE (→GE,EE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Omissions to cancel alteration , Cautionary accidentals

b. 47-48

composition: Op. 10 No 4, Etude in C♯ minor

e1 in AI & FE (→EE,GE1GE1aGE2GE3)

e1 in GE4 (→GE5)

..

In AI and FE (→EE,GE1GE2GE3) there is no  before the last semiquaver in these bars. It is most probably a mistake by Chopin, as there is no reason to change the figuration contour so clearly here, in addition, suggesting the C major key. The inaccuracy was not noticed and corrected until GE4 (→GE5).

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Errors of A

b. 50

composition: Op. 10 No 4, Etude in C♯ minor

..

In the last group of semiquavers, in the place where FE (→GE,EE) has a b1, in AI there is a c2. By introducing this clearly justified correction, Chopin did not check its result precisely – in FE (→GE1GE1a,EE) there is no  before c2, still necessary despite the change of the previous note from c2 to  b1. This patent oversight was corrected in GE2 (→GE3GE4GE5).  

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

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