Publisher Desc. The sung parts of the Mass are truly the song of the assembly. Written to sit comfortably in your parishioners' vocal range, Mass of St. Paul the Apostle is a setting that they will look forward to singing week after week! Featuring spirited rhythms, the music helps you express the new texts with enthusiasm. Rich harmonies and descant lines provide added depth to accompaniments you can play with keyboard or guitar alone, or with four-part brass for the major movements.