Paul McCartney said it's time an experimental Beatles track saw the light of day. McCartney said he wanted to release "Carnival of Light," a 14-minute experimental track the Fab Four recorded in 1967 but never released. The band played the recording for an audience just once, at an electronic music festival in London. It reportedly includes distorted guitar, organ sounds, gargling and shouts of "Barcelona!" and "Are you all right?" from McCartney and John Lennon. McCartney said during a recording session at Abbey Road studios he asked the other members of the band to "just wander round all of the stuff and bang it, shout, play it. It doesn't need to make any sense." "I like it because it's The Beatles free, going off piste," he told the BBC in a radio interview to be broadcast Thursday. Extracts of the interview were published Sunday in The Observer newspaper.