Instrumental Duet,Viola,Violin - Level 4 - Digital Download SKU: A0.1140180 Composed by Benjamin Hastings, Joel Houston, and Michael Fatkin. Arranged by Fabio Britto. Christian,Pop,Praise & Worship,Religious,Wedding. 4 pages. Fabio Britto #740436. Published by Fabio Britto (A0.1140180). Arrangement of the song So Will I (100 Billion X) - (Hillsong Worship) for Violin & Viola Duo.