Instrumental Duet,Piano Instrumental Duet,Piano,Viola,Violin - Level 3 - Digital Download SKU: A0.1282662 Composed by Johann Strauss Jr. Arranged by B. C. Dockery. 19th Century,Children,Classical,Film/TV,Romantic Period. 8 pages. Ben Dockery #873921. Published by Ben Dockery (A0.1282662). Austrian composer Johann Strauss Jr.'s famous waltz An der schönen blauen Donau, aka The Blue Danube: arranged for violin and viola duet with optional piano accompaniment. Great for lessons, recitals, and performances of all kinds. Intermediate level. Includes score and parts.