This is a piece from the famous Dutch organist Feike Asma. He was a pupil of the even more famous organist Jan Zwart. His son, Willem Hendrik Zwart, was the organist of the Hinsz organ in Kampen for years. I am not a Hauptwerk user (yet) but I have a friend who has The Bovenkerk sampleset. I had to turn the pages myself so in some parts there are little mistakes. My apologies for those who hate bringing failures of an organ to 'art' but I love the windmodeling.