The Dover Quartet, “the young American string quartet of the moment” (The New Yorker), unveils the second installment in its critically acclaimed Beethoven quartet cycle on Cedille Records. The three-album set of the “Middle Quartets” includes the three Op. 59 “Razumovsky” Quartets, infused with Russian folk tunes; the graceful “Harp,” Op. 74, named for its plucked string figures; and the intense Op. 95 “Serioso,” a forward-looking experiment that Beethoven originally intended “for a small circle of connoisseurs.”