CCWatershed has an extensive collection of organ harmonizations of the Kyriale and other chants. I went through some volumes and collected a few different settings of Mass XVIII.
Though they're meant as organ accompaniments for unison chant-singing, they can also be used as choral settings — they're all written strictly for four voices. I've programmed Mass VIII (de Angelis) from these collections, and while it's a little tricky at first to line up all the syllables, it's definitely doable and effective.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.
