 They want to hear the same songs over and over. So he and Gordon McClendon talked on the phone and invented Top 40 Radio. With radio featuring top hit singles, there was a demand for product, and record companies needed to supply that demand. Now, you have to realize the main commercial pop recordings were coming out of New York, Nashville, Detroit, London in the late 50s and early 60s. L.A. had a very established recording business, but it was really overshadowed by the film business. Here is producer Lou Adler to tell you more.