The fifth studio album from these British trip-hop pioneers suggests a dream sequence set in a posh club, delivering meticulously fabricated electronica full of whispery vocals and cushy synths. Tracks like "Joy Factory" a blend of busy drums and sci-fi sound effects, give off a dark, sleek vibe that gets old by album's end. Night is best when it rocks (witness "The Answer" an arena-ready stomper) or when a guest knocks it out of the park: Austin psych band The Black Angels help out on the very strong "Natural Selection" which mixes up futuristic trans-pulse with an earnest, richly harmonized tune that seems nicked from lost Sixties gem.