String Ensemble,String Trio - Level 4 - Digital Download SKU: A0.720088 By McFly. By Thomas Fletcher. Arranged by Marmpy. Contemporary. Score and parts. 7 pages. Marmpy Music #6480929. Published by Marmpy Music (A0.720088). Our string trio arrangements are for either two violins and cello or violin, viola and cello. There is an optional viola part that replaces the second violin part.