Instrumental Duet Alto Saxophone,Instrumental Duet,Trumpet - Level 3 - Digital Download SKU: A0.784011 Composed by Traditional. Arranged by John Groves. Christmas,Holiday,Praise & Worship,Sacred. Score and parts. 3 pages. John Groves #6631051. Published by John Groves (A0.784011). Angels We Have Heard On High - arranged for Bb Trumpet & Alto Sax Duet.