Little is known about the genesis of ?Lobe den Herrn meine Seele? (Praise thou the Lord o my spirit) BWV 143. A transcription from the 19th century was for a long time considered the only source; the musical text of the ?New Bach Edition? was based on this material. Recently however a copy of the score from 1762 has become available. It offers a more reliable musical text rendering a complete revision of the cantata necessary. On the basis of this new source the work is presented here as part of the ?New Bach Edition Revised? in what is presumably its original form in C major with three trumpets. This orchestration is more typical of Bach?s writing than the versionfor three horns in the surviving B-flat major version.Revised Urtext edition of the Weimar CantataBased on the ?New Bach Edition Revised? Idiomatic piano reduction