(Photo: Monika Rittershaus) The “Zürich Barock” Festival at the Zurich Opera House presents a rarity: “Scylla et Glaucus” by Jean-Marie Leclair, a composer best known for instrumental music, especially for the violin, which he himself played with great virtuosity. The opera premiered in 1746 and enjoyed moderate success, but soon disappeared from the repertoire. Its first modern performance took place {…}