The seduced people: “Valuschka” by Peter Eötvös in Regensburg. “Tragi-comedy with music,” is what the composer calls it.

30 percent of the non-stop 95-minute piece is new. The mastermind is an invisible prince. The title character is in the tradition of the classic opera jester. The tone sequence BACH sounds. Burlesque, with a love of color and detail, as if you were listening to the swept-up sound shards of a great whole that had been shattered.