One does not often get the sense that a museum is tapped in to vital underground culture, but the Berkeley Art Museum has proven itself with [email protected]: a series of Friday-night performances showcasing some of the Bay’s best local music. The five-floor cement reverb chamber that serves as the galleries is a wonderful acoustic space for artists to fill with sound — like Ellen Fullman using the entire building as a resonator for the overtone drones of her fifty-foot Long String Instrument, or Loachfillet sending deep blips of tape machine feedback bouncing off the walls. Shows have featured Bay Area musical pioneers like Terry Riley and the Residents, as well as more recent local artists like Sic Alps and Eats Tapes. Admission is only $5, and you can wander through the exhibits while getting new spatial perspectives on the sound. Upcoming performances feature Grouper, Gamelan Sekar Jaya, and Xiu Xiu’s Jamie Stewart.