Orkestra Projekt is the freewheeling younger brother of the more "traditional" classical music ensembles. "Agitate" showed off their casual atmosphere, eclectic musical tastes and growing following. Like their previous concerts this season, the show was book-ended by Led Zeppelin tunes. Chamber works by living composers filled in the middle. Scott Comanzo's "Bigot," for string quintet, with its relentless, nagging ostinato, could have benefited from more rehearsal time. For Tan Dun's piece, "Lament: Autumn Wind," Conductor and Artistic Director José Valencia stood in-line with the ensemble, which included Brian Grimm on pipa (the Chinese version of a lute). During the piece, ambient environmental sounds drifted through the open windows, adding another timbre to its already colorful sound. The performance of Steve Reich's "Different Trains" left much to be desired. Valencia's conducting was unnecessary and got in the way of the players locking in with the tape track.