GE1
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In A one can see that the roulade had initially only 14 notes, since the c
2 note was inserted later. Strictly speaking, Chopin remade the original c2 to a 
and added one note (c2) to the left-hand side and a second (c2) to the right-hand side. He also changed the marking of the number of notes in the group from 14 to 15.
Compare the passage in the sources »
category imprint: Corrections & alterations; Source & stylistic information
issues: Corrections in A
notation: Rhythm