Jesus, nichts als Jesus

Johann Bernhard Bach wrote a nice bicinium on the melody of "Jesus, nichts als Jesus". In the left hand part Bach comes surprisingly close to the Alberti bass, an accompaniment figure often used in the Classical era. Strange to hear it in a Baroque chorale prelude.

Score available here: http://partitura.org/index.php/johann-bernhard-bach-jesus-nichts-als-jesus/