Messidor is the fourth album from the UK's Aufgehoben, who record unformed improvised sounds and then, over a period of time, mix and mutate them into a not immediately identifiable form of raw instrumental rock noise. It is the discordant and hostile sound of mechanical beasts locked in a cage against their will via incredible levels of distortion, clattering percussion and a wide spectrum of overtones produced by scraped and scratched guitar strings. In time a sense of structure is revealed and the musicality of Messidor unfolds a la New Directions Unit, Throbbing Gristle, This Heat, and post-Nite Flights Scott Walker.