Instrumental Duet Cello,Instrumental Duet,Viola - Level 4 - Digital Download SKU: A0.815138 By Adele. By Adele Adkins and Greg Kurstin. Arranged by Julie Doubleday. Pop,R & B. Score and parts. 13 pages. Julie Doubleday #6567759. Published by Julie Doubleday (A0.815138). Hello by Adele for Viola and Violoncello Duet.