The Canadian Opera Company is thrilled with their new home at Toronto’s just-opening Four Seasons Centre for the Performing Arts, but the company is also trying to temper expectations of the acoustic before audiences get their first listen later this week. “After decades of pushing out enough sound to fill the unresponsive Hummingbird Centre, he said, the musicians of the COC’s resident orchestra are going to need time to discover how much is enough in the new building, which hosts its first public concert tonight… When it comes to the acoustics of music theatres, it seems, nothing is easy.”