After nearly a decade of Audion—in which Matthew Dear has exorcised his dancefloor demons through sometimes heavy, occasionally dirty, always ecstatic techno—a career-spanning retrospective is not only deserved, it's welcome. Audion X culls only the best tracks from Audion's singularly reckless mind: the swarm-of-bees climax of the DEMF-defining "Mouth to Mouth" and the stair-step hook of "Look at the Moon"; the serrated mayhem of 2004's "Kisses" and 2005's Suckfish full-length, the mischievous sensuality of 2009's singles series. And with a new Audion full-length (and accompanying A/V tour) on the horizon, X wouldn't be complete without a glimpse into the future: "Motormouth" and "Sky", two relentless new singles.