Changes

1.  Maestoso – Allegro con brio ed appassionato (C-minor, 4/4 time signature)

1.  Maestoso – Allegro con brio ed appassionato (C-minor, 4/4 time signature)

2.  Adagio molto semplice e cantabile (C-major, 9⁄16 [initial time signature])  

2.  Adagio molto semplice e cantabile (C-major, 9⁄16 [initial] time signature)  

“[T]he first movement is perhaps surprisingly conventional, echoing the mood of several other C minor works. … The second movement, by contrast, possesses an extraordinary visionary quality, transcending all previous piano music and even challenging the limits of the notational system in which it was written.”  [<ref>Cooper, Barry, Beethoven, Oxford University Press (2000), p. 290.</ref>]

“[T]he first movement is perhaps surprisingly conventional, echoing the mood of several other C minor works. … The second movement, by contrast, possesses an extraordinary visionary quality, transcending all previous piano music and even challenging the limits of the notational system in which it was written.”  [<ref>Cooper, Barry, Beethoven, Oxford University Press (2000), p. 290.</ref>]