For its annual special concert, performed Dec. 18, the Chicago Symphony Orchestra Brass, conducted by Michael Mulcahy, closed out the program with an arrangement of the Act 1 finale of Puccini’s Tosca. In the opera, as a choir and a processional sing the sacred Te Deum, Baron Scarpia declares his lust for Floria Tosca, the beloved of painter-activist Mario Cavaradossi, and reveals a scheme to eliminate his rival and steal Tosca for himself. The act ends with an explosion of brass, the perfect expression for the CSO’s legendary section.

    TOP: Michael Mulcahy conducts the annual CSO Brass concert Dec. 18 at Orchestra Hall. | Todd Rosenberg Photography 2019