I was aware that for some time there has been access to recordings of presidential meetings going back to the Kennedy Administration (and earlier), but was not aware of what all was available online from the Miller Center of Public Affairs. Their
Presidential Recordings Program has both audio and transcripts from the Kennedy, Johnson, and Nixon administration. One interesting bit I saw is one of the first tape, where Kennedy discusses domestic politics in Brazil and whether to back a military coup if necessary (
transcript; audio in
mp3; big file and audio has a lot of background hiss). Really interesting look back into the not-so distant past.