Little is known about the genesis of Â"Lobe den Herrn, meine SeeleÂ" BWV 143. A transcription from the 19th century was for a long time considered the only source; the musical text of the Â"New Bach EditionÂ" 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 Â"New Bach Edition Â- RevisedÂ" in what is presumably its original form in C major with three trumpets. This orchestration is more typical of BachÂ's writing than the version for three horns in the surviving B-flat major version.