Audible has the audio of the lectures available (not for free) in good quality as well. http://www.audible.com/search/ref=sr_1_18_asrch?searchAuthor=Richard+P.

Audible has the audio of the lectures available (not for free) in good quality as well. http://www.audible.com/search/ref=sr_1_18_asrch?searchAuthor=Richard+P.+Feynman&qid=1379093712&sr=1-18 http://www.audible.com/search/ref=sr_1_18_asrch?searchAuthor...