But in spite of the changing composition the band consistently plays high quality symphonic rock. The group is based on a number of regular group members such as Stuart Elliot and Ian Bairnson, complemented with varying lead vocals such as Colin Blunstone (the Zombies), Chris Rainbow and Gary Brooker (Procol Harum). Summary : The Alan Parsons Project is a British rock group, founded by Alan Parsons and Eric Woolfson.