Seger's prelude in C (L 20) is probably meant as a manualiter piece. For the true virtuoso it is of course possible to play the bass line with the feet, but I would have a hard time playing it like that. As a manualiter piece, it is quite easy to play and at the same time it is a perfect exxample of Seger's ability to build a mature composition from just one simple motif. It keeps amazing me how easy and natural the music of Seger seems to flow. It feels like the music could not have been wriiten any other way than the result we see and hear. Nevertheless, as the preludes L5 (https://partitura.org/index.php/josef-ferdinand-norbert-seger-praeambulum-l-5/) and L 16a (https://partitura.org/index.php/josef-ferdinand-norbert-seger-praelude-c-dur-l-16a/) show, Seger writes just as easily entirely different pieces based on the same opening motif.
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).
Score available here: https://partitura.org/index.php/josef-ferdinand-norbert-seger-praeludium-c-dur-l-20
