Instrumental Duet Cello,Instrumental Duet,Violin - Level 3 - Digital Download SKU: A0.910589 By Jason Mraz. By Jason Mraz, Michael Natter, and Mike Daly. Arranged by Raúl Andueza Blanco. Pop,Rock. Score and parts. 5 pages. Raul Andueza #6320355. Published by Raul Andueza (A0.910589). Easy arrangement for string duet (violin and cello). Appropiate for students or musicians who play in events and weddings.