Forty years ago, in 1967, pop radio listeners were hearing a new sound from the Beatles. Like many of the songs on Revolver, The Beatles daring and inventive album from 1966, the single released in the spring of 1967 shook things up as well. The recording sessions that would eventually in result their landmark Sgt. Pepper's Lonely Hearts Club Band also produced what some call the greatest single of all-time. Listen to a documentary on Strawberry Fields/Penny Lane at 7 p.m. on Monday, July 16 on The Listening Lounge.