Wow, good find! They definitely sound similar but it’s not a facsimile. I wonder if this holds for the other samples.

I guess in retrospect we asked it to continue the music in a likely way, not be novel. And it definitely convinced me enough to be impressive. An NN that composes completely fresh music, whatever that means (I’m sure most modern human music has a hefty dose of cross song sampling), would certainly be a good next goal post.

Interestingly, the original piece is a later Beethoven Sonata, Op. 31 No. 3. The model has its styles down! https://youtu.be/P-Q5aBAw-T4?t=78