Instrumental Duet Instrumental Duet,Viola,Violin - Level 3 - Digital Download SKU: A0.575078 By Billie Eilish. By Billie Eilish O'Connell, Billie O Connell, Finneas O Connell, and Finneas O'Connell. Arranged by Cadenza Editions. Pop. Score and parts. 8 pages. Cadenza Editions #5223823. Published by Cadenza Editions (A0.575078).