Trombone Duet Trombone - Level 3 - Digital Download SKU: A0.1087883 Composed by Traditional. Arranged by Christian Morris. Christmas. Score. 10 pages. Hoopla Sheet Music #692115. Published by Hoopla Sheet Music (A0.1087883). A dramatic arrangement of the popular German sixteenth century carol Quem pastores laudavere.� The theme is stated three times with increasing intensity, ultimately leading to a triumphant and exciting climax. Duet with optional third part.