B-Flat Trumpet,Instrumental Duet,Trombone - Level 4 - Digital Download SKU: A0.1268907 Composed by Franz Schubert. Arranged by B. C. Dockery. 19th Century,Classical,Romantic Period. 5 pages. Ben Dockery #861441. Published by Ben Dockery (A0.1268907). Composed by Franz Schubert in 1825 as part of his Op. 52, this is Ave Maria arranged for B-flat trumpet and trombone duet. Great for lessons, recitals, and performances of all kinds. Advanced intermediate level. Includes score and parts.