Summerfest hits a high note with classical concerts

TribLIVE: Summerfest, the new festival being presented by Opera Theater of Pittsburgh, expands its offerings this week to classical concerts. The festival’s repertoire features three diverse main shows — this week “Carmen” on Friday, “Candide” on Saturday and “The Magic Flute” on Sunday — but many of its other activities are centered on composer Wolfgang Amadeus Mozart, who wrote “The Magic Flute.”