Chicago-based avant-garde drone trio Locrian do fine work on their own (check out their excellent 2012 release The Clearing/The Final Epoch), but they're still probably best-known for their collaborations with bands like Horseback and Mammifer. Now they've teamed with German visual artist and experimental composer Christoph Heemann (H.N.A.S., Current 93, Jim O'Rourke) for a self-titled album of pure ambient: Sound ...