Beethoven and Haydn (which are spoken roles) have become characters, not statues. Everyone wears a T-shirt with his name stenciled on. Beethoven (Mark Bringelson), in torn jeans and a sideways baseball cap, might be a sincere skateboarder. Haydn (Michael Bonnabel), wearing a funky wig and a greatcoat over casual clothes, is a wise-cracking twit. Mezzo-soprano Cynthia Jansen sang Mozart with convincing conviction. Leopold Mozart was assigned to the quavering baritone Rod Nelman. Moving, too, was Bringelson's Beethoven, trying to comprehend the depths of this composer. ...Mitisek has fashioned effective music theater...