Rome/Berlin-based DJ/producer Christopher Ledger makes his Seattle debut, and it should be a heady night. His cerebral tech-house tracks abound with intriguing ambient tones and neoclassical piano motifs. Intelligent, psychedelic sound design rule in Ledger’s productions, which often recall Ricardo Villalobos’s oblique melodies and gliding and skittering rhythms. Succubass (aka Jessica Duran) has become one of Seattle’s most savvy and eclectic selectors, excelling at techno, breaks, and drum & bass. by Dave Segal