Ask HN: AI tools to enhance old SATB choir recordings?

I have some old recordings of a SATB choir (Soprano, Alto, Tenor, Bass), but the audio quality is quite poor. I also have the exact musical scores for each song.

I'm looking for AI tools/services that could improve the clarity and separation of each vocal part (and maybe also reduce noise and artifacts). If it can leverage the scores to guide the enhancement, the better.

Has anyone tried something similar or can recommend modern approaches or models for this?