Passacaglia semplice (2014) was written for Lee Ridgway, in thanks for his excellent work as program chairman for the 2014 American Guild of Organists National Convention in Boston, Massachusetts. It is meant for manuals only.
I used the Gedackt 8' of the Rückpositiv, my favourite stop of this organ. I recommend turning the volume a bit higher, so you can hear the very delicate (and beautifully sampled) lower notes. Speaking of breathing pipes... I added some dB to the audio output level due to the softness of this stop. In the small adagio part at the end I used the Flöte d'amor 8' of the Schwellwerk.