Instrumental Duet Instrumental Duet,Organ,Piano - Level 4 - Digital Download SKU: A0.848875 By Dave Koz & Kelly Sweet. By Irving Berlin. Arranged by Gene Roberson. Contemporary. Score and parts. 13 pages. Gene Roberson #6132247. Published by Gene Roberson (A0.848875). Piano Organ. Both for Classic organ, Theater Organ , Digital Organ with String Ensemble soundsPerfect for Recitals - Concerts.