The tonality of g minor seems to have been very inspirational to Sorge. Not only does he use it often (3 times in the first 6 choral preludes from this manuscript collection), he creates very elegant flowing music with it. This prelude is no exception. It has a relatively long, three voice, introduction, before the chorale melody enters. After that, the accompaniment is a two voice texture, just as in the other preludes.
The recording was done with the Hauptwerk software and the sample set of the Silbermann organ of the Stadtkirche Zöblitz by Prospectum (http://www.prospectum.com/index.php?language=english&id1=2&id2=8).
Score available here: http://partitura.org/index.php/georg-andreas-sorge-wir-christenleut/