Kaufmaan wrote two preludes to the choral "Christ lag in Todesbanden". This is the shorter of the two. It uses just the first two phrases of the choral melody. And even though Kauffmann has them repeated the piece is only three systems long.
The recording was done with the Hauptwerk software and the sampleset, made by Voxus, of the Müller organ in the Sint Bavokerk, Haarlem (http://www.voxusorgans.com/en/product/haarlem).
Score available here: http://partitura.org/index.php/georg-friedrich-kauffmann-christ-lag-todesbanden-alio-modo