LibriVox is a wonderful organization devoted to “the acoustical liberation of books in the public domain” and they have made available online FULL audio recordings of all of the tales contained in Chaucer’s The Canterbury Tales, and you can access those here:

LibriVox: The Canterbury Tales

Listening to Chaucer’s tales read aloud in their entirety, especially with some of the dramatic flourishes provided here, really makes the stories and also the poetry come alive. Keep in mind, though, that the readers here have opted to modernize much of the pronunciation, while retaining some of the Middle English inflections and pronunciations, so you don’t want to use these as guides for pronouncing Middle English.