Paul McCartney ponders releasing `` lost '' Beatles track , `` Carnival of Light '' 1967 recording long considered too experimental for mainstream audiences . Track has acquired mythical status among Beatles fans . McCartney would need the consent of Lennon 's widow , Yoko Ono , and George Harrison 's widow , Olivia Harrison , to release the track . The song was recorded in the summer of 1966 at Abbey Road Studios and features a string section with an electric guitar solo by John Lennon.
Paul McCartney ponders releasing `` lost '' Beatles track , `` Carnival of Light '' 1967 recording long considered too experimental for mainstream audiences . Track has acquired mythical status among Beatles fans . The song was recorded in the summer of 1966 at Abbey Road Studios and features a string section with an electric guitar solo by John Lennon.