Meine Seele erhebet denn Herrn

The second chorale prelude of the Neumeister-Choräle-not-by-Johann-Sebastian is again a prelude by Johann Michael Bach. It is a sort of a triple-prelude: the chorale melody is treated three times: first in the soprano voice, then in the bass, and in the last part the melody is embelished with rapid scales in the right hand.
The manuscript of this piece seems to contain a lot of transcription errors. Some errors are obvious (chorale melody notes missing), some are less obvious, some are perhaps not errors at all. Since I do not have another source I can not tell for certain. I took the liberty to change the notes that are in my opinion erraneous (because they are missing melody notes, or just because they sound odd). The original notes are indicated in footnotes, so anyone can judge for himself.

The prelude is notated in two staffs in the manuscript. I think the first two versus should be played with pedals. But I made a manualiter version of the score as well, so anyone can take his pick.

Score available here: http://partitura.org/index.php/johann-michael-bach-meine-seele-erhebet-den-herrn/