The 86th Quincena Musical de San Sebastián has unveiled its upcoming season. Here is a breakdown of upcoming vocal performances. “Rossini’s Stabat Mater” will feature the Orquestra de la Comunitat Valenciana, conducted by Mark Elder, will be joined by the Orfeón Donostiarra, conducted by José Antonio Sáinz Alfaro. Soloists include soprano Federica Lombardi, tenor Xabier Anduaga, and bass Will Thomas. {…}