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b. 12

composition: Op. 28 No. 1, Prelude in C major

..

In GE the middle note of the 2nd triplet is an erroneous d1. It is a consequence of the note having been inaccurately placed – too low – in FC.

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in FC , Errors repeated in GE

b. 13

composition: Op. 28 No. 1, Prelude in C major

..

In EE1 the last semiquaver in the R.H. in the 1st half of the bar is an erroneous a1 instead of an f1. The mistake was rectified in EE1a (→EE2).

category imprint: Differences between sources

issues: EE revisions , Errors in EE , Terzverschreibung error

b. 13

composition: Op. 28 No. 1, Prelude in C major

..

The correction visible in A – deletion of d as the 2nd semiquaver – shows the initial version of the chord constituting the harmonic basis of the bar. 

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A

b. 29

composition: Op. 28 No. 1, Prelude in C major

..

GE1 has f as the last semiquaver in the L.H. The doubtless error was corrected in GE2 (→GE3).

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 33

composition: Op. 28 No. 1, Prelude in C major

..

One can see a correction in A at the beginning of the bar – Chopin most probably deleted the crotchet e-g-c1-e1 chord and the fermata placed above it. According to us, it means that the final sustained passage was to be written as a common arpeggio (). Had Chopin wanted to both play this chord and perform the arpeggio, written in semiquavers, he would not have provided it with a fermata, which makes sense only in the last bar.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A