It's the Op. 111, a Piano sonata.
So this is the last of his sonatas and
HERE is the full sheet music.
It's written in C minor, and in the 45th measure it becomes more "flat" to
D flat major.
So I would guess that it would be something like "...oltrepassa piu' stonata e si cambia a re bemolle maggiore..."????
The book is very interesting but the prose is quite difficult for a non-english speaker like me. This book is for the Musical Aestethic exam.
This type of writing is very specialized, but after reading it for a time,
you will understand more and more, and then it will become very easy.
Now I'm going to go to bed, in Italy it's 2.10 AM.
Tomorrow I'll see the answers.
Thank you for the kindness.
Vai a nanna...sogni d'oro.
E prego.
I wish to improve my english fast, yet you can understand me!

Bye
You are doing very well. Just keep writing in English, and write,
and write, and speak, and write...
Ciao!