Until the year 2000, the New York City-based Guarneri Quartet consisted of the same four players who comprised the group at its 1964 founding: Arnold Steinhardt (violin), a former assistant concertmaster under Szell in the Cleveland Orchestra; John Dalley (violin), a one-time member of the Oberlin Quartet; Michael Tree (viola), formerly a highly respected concert violinist who converted to the viola; and David Soyer (cello), previously a member of several chamber ensembles, including the Bach Aria Group. Few chamber groups have maintained both the same personnel and such a con...