Backstage drama! The veteran prima donna suspects a conniving newcomer of trying to upstage her — both onstage and off! No, it’s not All About Eve, but almost! Now, on the parterre podcast “Unnatural Acts of Opera,” the Prologue to Ariadne auf Naxos from the Salzburg Festival 1954. Lisa della Casa, Hilde Gueden and Irmgard Seefried are the triumphant triumvirate heading the cast, with Karl Boehm conducting. Following the Prologue, a bonus from La Cieca: more della Casa, singing more Strauss, natuerlich! Hear this podcast now at Unnatural Acts of Opera.