There are lots of options for Chaucer, as he does not maintain a copyright. The headline link provides sound files of the text read in Middle English. The spelling is more phonetic than we are accustomed to, but even with that understanding, it\'s hard for the layman to divine the subtleties of the text. Even the scholars are making guesses, but it's nice to hear some approximation of the original.
This version is useful in that it allows you arrange the original text, and a modern English rendition, in whatever format you prefer.
This one has an extensive glossary which can be accessed without leaving the text.
If you're a wimp, here's the modern version, without distractions.
Eliot is harder to find, but here are sound files of him reading The Wasteland, if you have the right software.