“One peril of releasing your own music is that there's no one to veto your silly packaging, as Claude VonStroke's Bird Brain, on his own Dirtybird label, attests. But once you get past the appalling cover, the San Francisco-based producer's second album is a model of taut, tasteful house music that ably spans the tech-to-progressive spectrum. On lead track "Monster Island", VonStroke demonstrates a”