Live music in the PFA Theater is nothing new. But each of the three programs in Sounding Off delivers its off-screen inspiration in a different way. Jean Vigo's rebellious Zero for Conduct will find itself the object of another uprising with a barrage of music thrown by student DJs from UC Berkeley. Marcin Ramocki and Justin Strawhand's 8 Bit, a raving report about the demimonde of game hackers and chip tuners, will be complemented by Xik, a sound artist who modulates his music through Nintendo ES. And Tim Perkis's Noisy People, sonic sketches of eight aurally fixated artists, practices what its preaches with an ensemble of manic musicians in a post-screening jam.