Instrumental Duet B-Flat Trumpet,Instrumental Duet,Trombone - Level 2 - Digital Download SKU: A0.612812 Composed by Traditional. Arranged by Marcos Soares. Children,Holiday,Instructional,Standards,Traditional. Score and parts. 1 pages. Ateneu's #222006. Published by Ateneu's (A0.612812). Happy Birthday sheet music for trumpet and trombone. Easy arrangement for trumpet and trombone.