On January 5th 1967 the Beatles recorded one of their strangest pieces of music, and to this day, it hasn’t been released. It was called Carnival of Light.
It was ‘written’ by Paul McCartney, for a an event at the Roundhouse in Chalk Farm, London called “The Million Volt Light and Sound Rave” Paul was asked to contribute a piece by David Vaughan, part of designer trio, Binder, Edwards & Vaughan. Carnival of Light was premiered at the event, and has never been heard in public again since! Playing live at the event were Unit Delta Plus, featuring Delia Derbyshire from the BBC Radiophonic Workshop, who previously had recorded the theme tune to ‘Dr Who’.
One of the few people to hear Carnival of Light is Mark Lewisohn, who was given access to it during the preparation for his book ‘The Complete Beatles Recording Session’. He describes it as including “distorted, hypnotic drum and organ sounds, a distorted lead guitar, the sound of a church organ, various effects (water gargling was one) and, perhaps most intimidating of all, John Lennon and McCartney screaming dementedly and bawling aloud random phrases like ‘Are you alright?’ and ‘Barcelona!’
Paul McCartney has talked about the track many times since, but it still hasn’t been released. It was considered for the Beatles Anthology, but was vetoed by George Harrison. The ‘versions’ on youtube are sadly fake.