Superb singers and a clear production make a strong case for Ernest Chausson’s seldom heard “Le Roi Arthus.”Superb singers and a clear production make a strong case for Ernest Chausson’s seldom heard “Le Roi Arthus.”Read MoreOpera, Bard SummerScape Festival, American Symphony Orchestra, Bard College, Chausson, Ernest, Botstein, Leon, Proske, Louisa, Le Roi Arthus (Opera)