Double-barrelled

Says the Met press office: “Elizabeth Bishop will make her Met role debut as Fricka in Saturday evening’s performance of Wagner’s Das Rheingold, replacing Stephanie Blythe, who is ill. As previously scheduled, Bishop will also sing Mère Marie in Poulenc’s Dialogues des Carmélites on Saturday afternoon—a rare instance of a singer performing principal roles in two different operas in the same day.”