Brass Ensemble,Trombone Quartet Trombone - Level 3 - Digital Download SKU: A0.1183801 Composed by Pete Cross. Classical,Contemporary. Score and parts. 10 pages. Robert Peter Cross #783419. Published by Robert Peter Cross (A0.1183801). Happy trombones will need experience players to pitch the high notes, but I think players will enjoy playing Happy Trombones.