for SATB (with divisions) unaccompanied This dramatic setting of a 5th-century Ambrosian hymn perfectly epitomises the jubilation of the text. Rhythmically complex and involving some tricky melismatic passages, it is particularly suited to cathedral choirs and concert performance.. Format: Vocal score. Classification: Choral. Scoring: Voices (mixed) unaccomp.; SATB. Media: Printed music.