After 45 years performing, the Guarneri Quartet is packing it in. “Founded in 1964 at the Marlboro Music Festival, the quartet is noted for its stellar interpretations of repertoire ranging from 18th- and 19th-century standards to Bartók, Stravinsky and Walton. The group’s award-winning recordings of Beethoven’s middle-period quartets were followed by an Edison Award in 1971 and premieres of works by Hans Werner Henze and Ned Rorem in the ’90s.”