Arnold Rawls will sing the role of Calàf in tonight’s performance of Puccini’s “Turandot” at the Metropolitan Opera. Rawls will replace the originally scheduled Aleksandrs Antonenko, who is ill. Rawls recently sang Radames in “Aida” at Opera Australia as Don Jose in “Carmen” at the Bergenz Festival. He has also sung “Il Trovatore,” “La Wally” and Verdi’s Requiem. Rawls has {…}