Is "the end result" the Beethoven's sonata in Japanese scale?
If so, the most important reason that it sounds terrible is the music is generated with MuseScore, without adjusting dynamics, tempos, etc. Actually, the Beethoven's original sonata in this blog is also generated with MuseScore, and it sounds not so good even with dynamics added.
However, this is why I agree that deep leaning is more promising than this manual approach, since too many variables you need to adjust to make music sound good rather than syntactically correct.
If so, the most important reason that it sounds terrible is the music is generated with MuseScore, without adjusting dynamics, tempos, etc. Actually, the Beethoven's original sonata in this blog is also generated with MuseScore, and it sounds not so good even with dynamics added.
However, this is why I agree that deep leaning is more promising than this manual approach, since too many variables you need to adjust to make music sound good rather than syntactically correct.