MISSA ORBIS FACTOR • Rehearsal Score (with Piano Reduction)

(Schola and Treble Chorus will sing from this) - Rehearsal Score (14 pages) with Piano Reduction. --- “Missa Orbis Factor for Treble Chorus Chant Schola and Strings” --- The ordinary, in Roman Catholic liturgy refers to the part of the Mass that is reasonably constant without regard to the date.