The Beatles' entire catalogue was recorded over forty years ago.
Yet in both artistic and commercial terms, its power shows no sign of fading and the remastered versions of their albums have appeared in charts around the world.
Paul Gambaccini presents a two-part series, in which a range of artists and record producers talk about the legacy of The Beatles.
In part two, The Beatles On The Record, we hear how their music was captured on record with the help of innovative arrangements and adventurous production by George Martin.
Some of today's leading record producers - Peter Asher, Joe Boyd, T Bone Burnett, Jeff Lynne, Mark Ronson and Rick Rubin - marvel at the dazzling creativity evident in recordings made over 40 years ago.
Musicians Dave Grohl, Bob Seger, Slash, Susan Werner, Ann and Nancy Wilson (from Heart) and Brian Wilson also discuss the enduring influence of albums such as Rubber Soul, Revolver, Sgt.
Pepper's Lonely Hearts Club Band, The Beatles (The White Album) and Abbey Road.