I've been comparing scores and performances of this nocturne and, among the many differences, have discovered one major one, plus a couple more of interest. Can anyone help me make an educated guess about what Chopin actually wrote?
FIRST VARIANT (m. 24): C natural or C sharp?
In measure 24 (after the declining series of parallel thirds marked "aspiratamente"), a rising phrase begins. Some scores/performers begin the phrase with a C natural; others with a C sharp. (The same disagreement reappears when the theme is repeated in E major at measure 48.) For example, the 1915 Schirmer score shows C natural, but my Conservatory Canada Gr. 9 book shows C sharp.
Judging from Youtube videos, most performers play C natural (Arrau, Harasiewicz, Rubinstein, Richter, Horowitz, Pachmann, Barenboim, Godowsky, Grimaud, Grosvenor, etc.). But there are also important performers who play C sharp (Pollini, Ashkenazy, Sokolov, Paik, Vasary, etc.). Did Chopin intend for a minor third or a major third? The former (C natural) sounds more sentimental; the later (C sharp) reaches forward with more confidence. Both feel possible to me. Is there any way to discover which Chopin intended?
SECOND VARIANT (m. 20): Tie or repeated note?
This variation happens between measures 20 and 21. Some scores show a tie between the B half note at the end of m. 20 and B half note at the beginning of m. 21; others do not. (For one example of each: Conservatory Canada includes the tie; Schirmer 1915 does not, but the Schirmer 1894 does.)
Again, performers differ. Some include the tie (Arrau, Harasiewicz, Pollini, Richter, Grimaud, Ashkenazy, Paik, etc.) while others play the note a second time (Rubinstein, Horowitz, Barenboim, Godowsky, Grosvenor, etc.). This disagreement is not as important as the one above, but I'm still curious if there is a way to know which version Chopin intended. It affects the phrasing in the passage and the voicing between the melody and the alto line. It could also be a clue about what tempo Chopin intended; I notice that some pianists who play this passage slowly repeat the note, since the first note is quite dead by the time they reach the second.
THIRD VARIANT (m. 14): How many Ds?
In measure 14 a new phrase begins, with the melody starting on D for three beats. Some scores (e.g. Conservatory Canada-see photo, C.F. Peters 1879) show a dotted half note. Others (e.g. Schirmer 1915) tie a half note to a quarter for the same effect; the 1894 Schirmer and the 1880 Breitkopf und Hartel achieve the same by tying three quarter notes together. But the London Augener 1883 score puts a phrase mark over three separate quarter notes, and the "urtext" edition here on Pianostreet (see photo) shows a quarter note followed by a half note!
I think I've heard some variation here with performers, too, though I didn't keep record.
Can anyone here shed light on any of these textual variants? The first one in particular bugs me. Do I simply need to choose which I like best and go with it, or is there some way to deduce Chopin's intention?