Brass Ensemble Horn,Trombone,Trumpet - Level 3 - Digital Download SKU: A0.850004 By Otis Redding. By Otis Redding and Steve Cropper. Arranged by Michael Dotterer. Soul. Score and parts. 17 pages. Michael Dotterer #6520577. Published by Michael Dotterer (A0.850004). (Sittin' On) The Dock of the Bay for brass quartet. Parts: 2 Trumpets, Horn in F, Trombone, and a score. A substitute trombone part for the Horn in F is also included.