There is a famous (and true) story from the early seventies about his receiving a white label (pre-release test pressing) of a new record by John Lennon and Yoko Ono. It was an exclusive. He reviewed it at length in Melody Maker. Side 1 had a normal enough format — five or six songs — but his attention was taken by side 2, which consisted of a 20-minute-long continuous tone — a pure sine wave. This was the kind of bold experimentation that one expected of John and Yoko, and Williams, clearly impressed, reviewed the piece favorably and at some length. It turned out to be a test tone — he didn’t know that it was common practice for cutting engineers to cut a pure tone on to test pressings in order to monitor things like turntable stability and vinyl quality.