- Katherine Ciesinski, Dominique Labelle, Mirella Freni, Tanglewood Festival Chorus, The American Boychoir, Tanya Roudenko, Boston Symphony Orchestra, Richard Clement, Dennis Peterson, James Litton, Janis Taylor, Jorge Chaminé, Maureen Forrester, Ernesto Gavazzi, Julian Rodescu, Seiji Ozawa, John Oliver, Dmitri Hvorostovsky, Sergei Leiferkus, Vladimir Atlantov