Instrumental Duet Instrumental Duet,Marimba,Vibraphone - Level 4 - Digital Download SKU: A0.906888 Composed by Johann Sebastian Bach. Arranged by Steven Machamer. Baroque,Concert. Score and parts. 7 pages. Steven Machamer #4354991. Published by Steven Machamer (A0.906888). An arrangement suitable for vibraphone and marimba, four mallets.  Wonderful melodies and bass lines, plus counterpoint, and invention like writing.  A great jury piece, encore, or competition choice.  This movement stands alone as a substantial work on a program. The arrangement brings much of the original chamber orchestra work to a four mallet version for one player.