Prélude Funèbre is number 10 of Lemmen's École d'Orgue, basée sur le plain-chant romain. Lemmens precribes a Bourdon 8 and Basson 8 for the left hand. The Cracov sample set doesn't have those, but it does have a Bourdon 16 and Basson 16. So I used those and played the left hand part an octave higher than notated.