(ELECTRONIC-MUSIC FEST) Decibel’s Friday agenda starts with Shitkatapult’s assorted German, Detroit, and Seattle producers—including Apparat, Jerry Abstract, and Kero—skillfully infusing techno, electro, and IDM with both smarts and gutsiness. After-hours, get your unconventional groove on with the Shameless crew’s rambunctious lineup of party-igniters, including ex-Astralwerks techno superstar Freaky Chakra, DJ Recess, Samuel Kirkland, Justin Byrnes, Jizosh, and others. (Chop Suey, 1325 E Madison St, 324-8000. 9 pm, $10, 21+; Decibel After-hours: Cascadia Film Collective Warehouse, 1410 14th Ave, 903-1841. 1–6 am, $5.) DAVE SEGAL