This compilation of bristly beats and constricting suspense translates as "Diamonds and Rockets," which might imply that these (mostly) previously released "post-techno" Teutonic jack trax are gleaming, unblemished bangers. And yet the most compelling moments are the tracks' meticulous flaws. The pockmarked partitions of Phage & Daniel Dreier's "Bees Wax," the braided and abraded blurts of Johannes Heil's "Freaks R Us," the stalking burbles of Raudive's "Turn It Off"-these are the style's memorable facets. Avus, 2 Dollar Egg, Alter Ego, and more also deliver pneumatic deep tech and condensed tension. How 'bout Diamond-Etched Grooves and Ruckus?