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I was listening to Pandora, and a piano piece by Chopin came on titled
Nocturne for piano in C sharp minor (doubtful), KK Anh.IA/6
And I simply am wondering why is the key doubtful? Is that what's "doubtful" about the piece or am I missing something? I would think Chopin knows what key he's writing in, no?
The work appears in the Chomiński's catalogue of Chopin. It is the authorship that is doubtful. Often such works are called spurious rather than doubtful.
The score is here.
