Instrumental Duet Instrumental Duet,Trombone,Trumpet - Level 2 - Digital Download SKU: A0.689965 By Idina Menzel. By Kristen Anderson-Lopez and Robert Lopez. Arranged by Fabio Britto. Broadway,Film/TV,Musical/Show,Pop,Wedding. Score and parts. 3 pages. Minhas Partituras #6711341. Published by Minhas Partituras (A0.689965). Arrangement of the song Let It Go (from Frozen) for Trumpet in Bb & Trombone Duo.