Cabus - Sonata a Tre for Trumpet, Horn and Trombone - BRE0505EJM Editions Maurer Sale! from $23.00 Qty. Add to Cart SKU: BRE0505EJM Peter Cabus- Sonata a Tre for Trumpet, Horn and Trombone. Instrumentation: Trumpet (in C) Horn (in F) Trombone (in C)