For the pronunciation of post Classical Latin:
Singing Early Music: 0253210267 claims that on their disc (with the book)
"A specialist presents each of the languages or dialects
included, which are English, Scots, French, Occitan, Catalan,
Spanish, Portuguese, Galician- Portuguese, Italian, German, and
Flemish, as well as the characteristic Latin of each area;
sample texts can be heard on an included compact disc." (emphasis not in the original)
This implies that Latin pronunciation changed distinctively region by region across Europe, and century by century from classical to renaissance.
This is accessible as a Google book, so not really a website; simply for this specialist field of local medieval sung Latin, the subject is being researched and the results are available here and elsewhere if you need them.