After having much of their discography reissued by Water, Lilith, and Captain Trip Records, Berlin's Cluster take a well-deserved victory lap. The pastoral warmth of the trio's '70s recordings casts Krautrock in a gauzier shade than Can or Kraftwerk; lovely listening still, the Cluster albums define a certain strain of European ambient music and are all the more impressive for their synthesizer-free origins. It's easy enough to hear the group's influence on any number of minimalist bands today, two of which — White Rainbow and Tussle — round out their Great American bill. Get your tickets asap, because Cluster probably won't make a habit of touring America.