Viola Solo - Level 3 - Digital Download SKU: A0.1287195 Composed by Mac Miller. Arranged by BTmusic. 21st Century,Multicultural,Pop,Rock,Wedding,World. Individual part. 2 pages. BTmusic #878204. Published by BTmusic (A0.1287195). This is a very nice arrangement of Congratulations, by Mac Miller, for Viola Solo. Enjoy it!