In the entire Etude, in all manuscripts some of the repeating figures were written in an abbreviated manner using the // or •/• signs. CDP includes the highest number of such abbreviations, while A – the lowest (they appear only in bar 12, they are absent in bars 1-8). In CDP the abbreviated notation of the part of the L.H. in bars 1-2 is not clear – already the second figure in bar 1 is written as repetition of the first. If interpreted literally, it would mean that the bass note in these bars is eight times A
1, which, from the piano interpretation point of view, is inacceptable.
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notation: Shorthand & other