Kauffmann wrote two preludes to the choral “Wie schön leuchtet uns der Morgenstern”. For the organ solo one, Kauffmann prescribes the use of a Bourdon 16′. That seems a bit strange to me, for a choral whose text features words like Morgenstern and Freudenschein. In the recording I follow Kauffmann’s registration prescription, but play the music an octave higher than notated.