Instrumental Duet,Piano Cello,Instrumental Duet,Piano,Violin - Level 2 - Digital Download SKU: A0.623538 Composed by Spiritual. Arranged by Stephen DeCesare. Christian,Easter,Sacred,Spiritual. Score and parts. 12 pages. Exultet Music #4359091. Published by Exultet Music (A0.623538). Vibrant arrangement of the very popular Spiritual Somebody's Knockin' At Your Door which has been freshly arranged as a duet for a Violin and Cello with Piano accompaniment. Accessible and appropriate for any church or concert setting.  .