Kronos Quartet with Geographer, Magik*Magik Quartet, and Real Vocal String Quartet. 2 p.m. Sunday, July 14, at Stern Grove Festival; Free.
The repertoire of San Francisco chamber ensemble Kronos Quartet is both large and staggeringly diverse. As likely to collaborate with minimalist composers like Philip Glass as to interpret the pop songs of Bob Dylan or Television, Kronos Quartet is a venerable institution of contemporary classical music. But if Kronos is a groundbreaking classical ensemble with fascinating forays into pop, Geographer is a progressive local rock group with interesting forays into classical. For the opening slot with Kronos Quartet, the band's densely textured electronic pop will feature a string quartet of its own, making this week's lineup representative of both the new and old guard of progressive music.