Andrew Brook "Andy" Jackson is a British recording engineer best known for his work with the British progressive rock band Pink Floyd. He is also the owner and operator of Tube Mastering, a private studio specializing in recorded music mastering.[1] Career Originally trained in the profession by producer/engineer James Guthrie at Utopia Studios and serving as his assistant for several years, Jackson began work as an engineer for Pink Floyd in 1980, assisting in the recording of the performances of The Wall at Earls Court.