So Percussion studies many greats and has a sharp ear for tone, but something’s amiss here. The New York trio experiments with pipes, glockenspiel, vibraphone, wood planks, metal, marimba, duct tape, and even an Ethernet port. The result plays like soothing minimalist wallpaper. “May” lays down a brilliant Steve Reich-style vibe among samples of human gibberish, and “Go” treads upon a music-box groove that many IDM blokes could never get right. But there is a nagging sense that So Percussion only gives five percent of their power here.