Piano,Voice Duet Piano,Voice - Level 4 - Digital Download SKU: A0.1048911 By Johann Sebastian Bach--BMV 508. By G. H. Stölzel. Arranged by Steve Stanfill. Baroque,Classical,Wedding. 3 pages. Steve Stanfill #653302. Published by Steve Stanfill (A0.1048911). This is a vocal duet arrangement of 'Bist du bei mir (When Thou Art With Me) for Alto and Baritone/Tenor voice. It is adapted from the original Urtext version by Johann Sebastian Bach included in the Notenbüchlein für Anna Magdalena Bach. The YouTube link is a solo performance in C Major by Benjamin Appl, a fine singer with impeccable German diction and performance practice.