For 11 voices in 3 choirs, instruments and continuo.
The Scala Aretina is Valls' best-known work, taking its name from the Guidonian hexachord upon which it is constructed. The mass gave rise to one of the most contestedcontroversies in the history of music: in the Qui Tollis of the Gloria, the entry of the 2nd choir soprano forms an unprepared ninths - certainly an infringement of the rules of harmony. This sparked off an unprecedentedbattle among Spanish musicians as to the va...