Instrumental Duet,Piano Instrumental Duet,Piano,Viola,Violin - Level 2 - Digital Download SKU: A0.978861 Composed by Johnny Marks. Arranged by Stephen DeCesare. Children,Christmas,Standards,Traditional. Score and parts. 11 pages. Exultet Music #584528. Published by Exultet Music (A0.978861). The charming Christmas song has been freshly arranged as a duet for Violin and Viola with Piano accompaniment. Accessible and appropriate for any school or concert setting.