Instrumental Duet Instrumental Duet,Piano - Level 1 - Digital Download SKU: A0.758949 Composed by Johann Sebastian Bach. Arranged by Ester Alessandrini. Baroque,Concert,Contemporary,Sacred,Wedding. Score and parts. 6 pages. Ester #6708549. Published by ester (A0.758949). Easy transcription for piano 4 hands from Bach Choral.