Middle English pronunciation: http://www.courses.fas.harvard.edu/~chaucer/pronunciation/.
Anyone interested in the history of English has to read Chaucer’s Canterbury Tales in the original Middle English version. If you’re used to Shakespeare and Golding’s translation of Ovid’s Metamorphoses, it’s not too much of leap to go back a little further to the 14th century (Beowulf in the original is a different can of sardines). Jill Mann’s book, click top link, is extraordinary value at $13. There are extensive notes to help you. I wish New Directions would do a similar job with Pound’s Cantos.