Instrumental Duet Cello,Double Bass,Instrumental Duet - Level 4 - Digital Download SKU: A0.916298 Composed by Rain Worthington. Concert,Contemporary,Instructional,Standards. Score and parts. 5 pages. SR Worthington #6566271. Published by SR Worthington (A0.916298). A duet for cello & double bass. Duration: ca. 5:30. Publisher: SR Worthington (ASCAP)(Audio is a midi realization).