Piano,Tenor Trombone - Level 5 - Digital Download SKU: A0.1379166 Composed by William Pagan-Perez. 21st Century. Score and part. 44 pages. William Pagan-Perez #963841. Published by William Pagan-Perez (A0.1379166). Originally this concerto was written for trombone and orchestra. Now, it has a reduction for the piano available. It is a melodic and dynamic multi-movement solo for trombone with a rhythmic and energic accompaniment.