Piano Trio,String Ensemble Cello,Piano,Viola - Level 4 - Digital Download SKU: A0.687760 Composed by Michael W. Smith. Arranged by Fernando Britto. Praise & Worship,Spiritual,Wedding. Score and parts. 6 pages. Minhas Partituras #6593605. Published by Minhas Partituras (A0.687760). Arrangement of the song Agnus Dei (Michael W. Smith) for Viola & Cello Duo and Piano Accompaniment.