MUSIC

Tenor Luciano Pavarotti has canceled four sold-out performances of Puccini’s “Tosca” with the Pittsburgh Opera because of the bronchitis that forced him to leave the stage when his voice cracked Monday. Tito Capobianco, the opera’s general director, said that Ermanno Mauro will sing in Pavarotti’s place. Monday’s performance was the first of Pavarotti’s five scheduled appearances over two weeks with the opera. “When you have to leave the stage and when you have to leave the theater, it’s always very sad, and you feel miserable because you cannot make your duty, which is the worst thing for me,” Pavarotti said at a news conference Wednesday.