WGBH has hosted many string quartets in its performance studio. Hear three of the best, playing music by Joseph Haydn. Two hundred years ago — May 31, 1809, to be exact — Joseph Haydn died at age 76.

Is the Bay Area really the center of classical music disruption, the region’s favorite term? Last week offered some reasons to think so. There was the news that the San Francisco Symphony had made Esa ...