Conductor Leonard Slatkin, composer William Bolcom, and an orchestra from the University of Michigan were the big winners among classical nominees at the Grammy Awards last night. Mariss Jansons and the Bavarian Radio Symphony took home the award for best orchestral performance, and the Emerson Quartet’s complete set of Mendelssohn quartets won best chamber music performance. In the jazz division, major awards went to Wayne Shorter, Pat Metheny, and Sonny Rollins.