Relations within Pink Floyd completely broke down during the making of their 1979 double LP The Wall. Roger Waters was now writing most of the songs by himself, and he froze out the rest of the band - even booting founding keyboardist Richard Wright midway through the process. Producer Bob Ezrin somehow kept the sessions moving along, and he even convinced Waters to add a disco beat and a children's choir to Another Brick in the Wall, Part 2, helping the band score a rare hit single. The album itself is a rock opera about a Waters-like rock star named Pink who's haunted by the death of his father in World War Two. Waters has spent the last three years taking a revived version of the original Floyd stage production on tour all over the world.