If you are familiar with this nocturne, Op. 9, No.2, In Eb Major., you will find many details are different from the standard version, mostly with the ornaments. They are authentic, though the composer did not intend to put all of them into one single performance, as this recording does. (If any one interested in learning those variants, they can be found in The National Edition of the Works of F. Chopin, ed. By Jan Ekier.)
Enjoy.
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