All look very much the same, though the Cleveland’s violas sit where the New York has its cellos, and Szell uses one more trombone and one less horn than Erich Leinsdorf does in Boston.

This film portrays the Quatuor Mosaïques from the first rehearsal of Beethoven's Quartet No. 14 opus 131 until the day of its premiere. Santiago's camera spies on the rehearsals and witnesses the ...