Long in the making, Treasure State is a startling collaboration between two rogue American groups: Known for playing the music of Steve Reich, David Lang, and Paul Lansky, Brooklyn-based quartet So Percussion are acknowledged virtuoso performers of classical and avant-garde writing for percussion, and are increasingly recognized as composers in their own right. Musique-concrete oddballs brought into the mainstream by their collaboration with Bjork, Baltimorean electronic duo Matmos are infamous for turning bizarre sound sources (from plastic surgery to live snails) into shuffling rhythmic pop.