The vocal ensemble Sourcework, together with the plainchant specialists Schola Antiqua and the ministriles of La Danserye, present the Missa super octo tonos by Sebastián de Vivanco (1553?-1622), professor and chapel master. The musicians perform both polyphony and plainchant from the original notation, gathered around the choir book printed by Susana Muñoz (d. 1625), in a liturgy inspired by the opening of the academic year in Golden Age Salamanca.