In 2012 I felt very privileged to make a tour around the Abbey Road Studios in London. It was the same room in which one producer (George Martin) and a recently contracted group of musicians (The Beatles) 50 years earlier (in 1962) started out to revolutionize everything that popular music was about. The first recordings ('Love Me Do' and 'P.S. I Love You') might not be clear indicators of what was to come, but in the years afterwards this...