Ok, being able to memorise and play so many classical pieces is one thing but also being able to transcribe the notes well enough for other people to understand and play is bs. I don't see any explanation saying that she was a professional musician in her past life.
I can play Fur Elise perfectly by memory, but if you ask me to rewrite the notes it would be horrible. I can write the basic notes, but not the proper rests and ligatures and other important notations. Someone trying to read that would not be able to play properly.
Did I miss a part where was explained that there's other people who are better tlat transcribing music by ear? Like if she just played and it's those people who recreated the music sheets then it makes more sense.
I know that the protags in so many isekai series can remember weirdly detailed things that most people don't, like even blueprints of machinery sometimes. This just bothers me because the series has been fairly down to earth so this just feels obtuse on the author's part.
I do appreciate the proper attention being put on etiquette though, and the author seems to have used actual historical photos and art as reference for the backdrop nobles.