Arranged for choir, congregation, and optional C instrument, this setting of the traditional plainsong provides a poignant moment in your Advent worship services. The third verse includes a lovely SSA section that continues to include optional congregation in unison. This is a fresh way to incorporate a hallmark song of the season. Orchestration is available separately for flute, oboe or second flute, two B-flat clarinets, two percussion parts, two violins, viola, cello, and string bass.