I was big into tapes back then, and I think the first was David Lanz and Paul Speer. Natural States, maybe?
https://www.youtube.com/watch?v=1rrSvQY1xKw
https://www.youtube.com/watch?v=1rrSvQY1xKw
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan