2/2. The most famous album of all time - the Beatles' Sgt Pepper's Lonely Hearts Club Band - was released 40 years ago this month. Now critically eclipsed by some of the band's other works, the immaculately produced concept LP nevertheless transformed the pop landscape. Its Grammy-winning engineer, Geoff Emerick , heads back to Abbey Road Studios to reveal the innovative techniques that resulted in the unique sound of era-defining tracks such as A Day in the Life and Lucy in the Sky with Diamonds. With the analogue four-track equipment originally used in 1967. modern acts such as Oasis, Kaiser Chiefs, Travis, the Fratellis, the Fray and Richard Ashcroft record their versions of the work's various songs.