Brass Ensemble Trombone - Level 4 - Digital Download SKU: A0.792677 Composed by Michael McGuire. 20th Century,Contemporary. Score and parts. 22 pages. Gordon Cherry #5712455. Published by Gordon Cherry (A0.792677). Michael McGuire has composed a bold and dramatic fanfare for Trombone Choir. It is dedicated to the L.A. Bones West ensemble which was born in 1980 by legendary Bass Trombonist George Roberts. Written for moderately advanced performers, the work has 11 parts divided into two antiphonal choirs.