Keith Fullerton Whitman is the kind of artist who makes spacious ambient music about as exciting as any shredding death metal anthem or blood-pumping hyphy track. With his roots buried in the soil of musique concrète, Track4 (2Waysuperimposed) finds Whitman up to some astoundingly complex bi-directional (a 21-minute track plays the same backwards and forwards!) work. As expected, the composition is soaked in micro fuzz and guitar squeals, but it’s the sporadic bass that’s responsible for swelling heads and dizzy listening.