Barcelona-based music festival Sonar organized small events last year in New York and Washington, D.C., and it presents its first full-scale U.S. event in Chicago from Thu 9/9 through Sat 9/11. Sonar Chicago includes movies, lectures, multimedia art, an online radio station, and of course music—Sonar features an international lineup of circuit benders, soundscape artists, DJs, programmers, and instrument designers, with a focus on electronic experimentation. Thursday’s program, at Pritzker Pavilion in Millennium Park, begins at noon and includes Kid Koala’s live-band project the Slew and Detroit electronic-music artist Jimmy Edgar. Friday and Saturday’s daytime programs, both at the Chicago Cultural Center, begin at 3 PM; Friday’s lineup includes Markus Popp’s Oval, LA-based producer Nosaj Thing, and Lesley Flanigan, while Saturday’s includes postminimalist Ben Frost and the Flashbulb featuring the New Millenium Orchestra. A Sonar Club Night at 10 PM on Friday at Smart Bar features sets by dubstepper Appleblim, Cosmin TRG, Black Devil Disco Club (aka Bernard Fevre), veteran genre-hopping producer Todd Osborn, and Space Dimension Controller. The first-floor Garland Room of the Chicago Cultural Center hosts a five-film program called Sonar Cinema beginning at 1 PM both Fri 9/10 and Sat 9/11, while the Randolph Cafe hosts 4 PM lectures from Appleblim (Fri 9/10) and DJ Ron Trent (Sat 9/11). With the exception of the Smart Bar show on Friday, which costs $5, everything is free. Visit sonarchicago.com for more info.