Johann Joseph Fux was Hofkapellmeister in Vienna from 1715 until 1741. Many of his masses use the choir strengthened by strings, cornetts and trombones, often with independent moments for the instrumentalists and sometimes. "Missa SS Trinitatis" uses two choirs, which again points to the traditions going back to Gabrieli. His highly successful Requiem is for five vocal parts, two cornetts, two trombones, strings and continuo. He also uses the trombone in smaller motets and antiphons, such as his setting of "Alma Redemptoris mater" for soprano, alto trombone, strings and continuo. Some of his chamber music involves trombones, as do many of his operas, used as an obbligato instrument.