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.

In a move that stunned local arts patrons, the Los Angeles-based Angeles String Quartet has announced it is disbanding after more than 13 years. The decision was all the more surprising because the ...