A mad scientist who obviously doesn't get out of the lab much, DJ Shadow spends Endtroducing rewiring the Mo' Wax sound he helped invent. This snootiest of British dance labels made stars out of train-spotting DJs, hooking up countless samples and special effects into a hypnotic pastiche of tripping, hopping beats, and Shadow was its biggest star of all. The dystopian New Age of Endtroducing sounds like an alien spacecraft touching down on the autobahn late at night, probably to check out Earth's used-vinyl bins. Endtroducing is headphone macrodub with a crafty Californian sense of humor, and the lamentable fact that DJ Shadow has spawned a thousand corny knockoffs doesn't stop grooves like "Building Steam With a Grain of Salt" from ringing out like hell's bells. This is DJ culture at its boldest: steeped in the past but zooming into the Space Age future.