The Palau de les Arts in Valencia, Spain, has announced its 2021-22 season. For the purposes of this article, we will highlight the vocal and operatic performances. The season opens with Verdi’s “Requiem.” James Gaffigan conducts a production by Romeo Castellucci starring Elena Tsallgova, Sara Mingardo, Sebastian Kohlhepp, Nahuel Di Piero, and the Escolania Mare de Déu dels Desemparats. Performance {…}