was absolutely on the cutting edge of that. ♪ wouldn't it be nice if we were older ♪ ♪ and we wouldn't have to wait so long ♪ >> music in the '60s was like any great art movement. the greatest practitioners of it pushed one another to be better. >> the mic on the piano is quite low. >> in the studio, the beatles' natural creativity was sort of brimming over, and george martin was a brilliant collaborator and champion of that. >> run back the tape, please, would you? >> you can slow down or speed up the tape. you can put in backwards stuff. you can put in electronic sounds that you couldn't possibly reproduce live. >> something happens on air, i couldn't tell you what because we have a special man who sits here and goes like this, and the guitar turns into a piano or something, you know. and then you may say, why don't you use a piano? because the piano sounds like a guitar. ♪ we're sergeant pepper's lonely