Paul McCartney composed the music for an effects tape by The Beatles for the " underground" movement's Carnival Of Light Rave. The press described it .. "a tape of electronic noises". The Beatles had never made a recording quite like this before...it was a combination of a one-take basic track plus numerous overdubs, so that by its end it included distorted, hypnotic drum and organ sounds, a distorted lead guitar, the sound of a church organ, various effects...perhaps most intimidating of all, John and Paul screaming dementedly and bawling aloud random phrases like "Are You Alright" and "Barcelona!"...