For an introduction to the Lynar B3 manuscript, see http://partitura.org/index.php/heinrich-scheidemann-praeludium-e-moll/. Though the name of the composer of most of the preludia is not known, they all follow more or less the same pattern. An introduction sets the mood and the tone (key), then follows a fugal section, after which the prelude ends with a third short section, often either based on the first section of on the thematic material of the second section. The prelude on page 32 of the manuscript follows this same patter. After 9 bars introduction follows a 10 bar fugal section. The last four bars are reminescent of the opening section. A short work, that can come in handy when you have one and a half minute to fill with music during a service.
The recording was done with the Hauptwerk software and the sampleset, made by Voxus, of the Matthijs van Deventer-orgel in the Grote Kerk, Nijkerk (https://www.voxusorgans.com/en/product/nijkerk).
Score available here: http://partitura.org/index.php/anonymus-praeludium-ms-lynar-b3-page-32