Instrumental Duet,Piano Instrumental Duet,Piano,Viola,Violin - Level 3 - Digital Download SKU: A0.1414000 Composed by Felix Bartholdy Mendelssohn. Arranged by Bragi Thor Valsson. 19th Century,Christian,Christmas,Religious,Sacred. 6 pages. Arctic Dragon #995769. Published by Arctic Dragon (A0.1414000). An arrangement of the Christmas song Hark, The Herald Angels Sing for Violin and Viola with Piano accompaniment.