This Capricio in d is based on Roberday's "Fugue 5me". Karges largely follows Roberday's original, but he adapts it to suit his needs. As with a lot of Karges' adaptations, Karges adds several possibilities to make the piece longer or shorter, depending on the need of the moment in the service it is played. He adds the possibility of a repeat that is not present in Roberday's original, he indicates a fragment that can be skipped and he adds the possibility to play a shorter ending than the one present in Roberday's original.
Score available here: http://partitura.org/index.php/wilhelm-karges-francois-roberday-capricio-in-d
The fugue shows that Roberday knew his couterpoint. He writes a chomatic fugue theme, that is answred by the descending inversion of it self. The ascending and descending version of this theme keep alternating in the rest of the fugue. Rather ingeniously written and one wonders why Roberday is not more well known than he is.
The recording was done with the Hauptwerk software and the sampleset, made by Sonus Paradisi, of the Janke organ in the Stadtkirche of Bückeburg (https://www.sonusparadisi.cz/en/organs/germany/buckeburg-janke-organ.html).