thinking lately that Paul Simon is a genius in music...
In the fall of 1969, I brought my reel-to-reel tape recorder to my college dormitory and suddenly became quite popular. At the time, there was a rumor that Paul McCartney was dead and that the Beatles' recording of "Revolution #9" would provide clues about his death if played backwards. With my device, I could play the tune backwards after recording it.
Indeed, the expression "number nine," which was repeated throughout the tune sounded sort of like "turn me on, dead man" when played backwards, but that was the only clue that we found. In any case, McCartney showed up in the media very much alive soon afterwards.
Beatles ‘Revolution’ November 1968
Simon & Garfunkel ‘Bridge over troubled water’ January 1970