There are many ideas, even books full of ideas (see e.g. https://www.amazon.com/Algorithmic-Composition-Paradigms-Automated-Generation/dp/3211999159 https://www

There are many ideas, even books full of ideas (see e.g. https://www.amazon.com/Algorithmic-Composition-Paradigms-Automated-Generation/dp/3211999159 https://www.amazon.com/Algorithmic-Composition-Paradigms-Aut...), but I rarely hear an example which is not disappointing. Recent developments seem to produce better results. If you're interested in a current approach with very promising results see e.g. https://openai.com/blog/musenet/ https://openai.com/blog/musenet/.