Richter's fifth Trio from his opus 20 is the only 'free' trio of the 6 contained in that opus. Unlike the five others it is not based on a choral melody. Intruiging is that the style is more modern than the style of the other 5. Still not what you would expect for a piece written around 1850, but where the others sound like they were written more than a century earlier, the fifth trio sounds like it was written perhaps 50 years earlier. The frequent parallel thirds and sixths sound more classical than baroque as do some of the melodic and rythmic phrasings. The recording was done with the Hauptwerk software and the sample set of the Holzey organ of St. Peter and Paul in Weissenau by Prospectum (http://www.prospectum.com/index.php?language=english&id1=2&id2=9). An edition with Richter's complete opus 20 is available here: http://partitura.org/index.php/ernst-friedrich-richter-6-trios-organ-opus-20/