Sigvald Rørlien has been working as a Hardanger fiddle maker for Kringsjå A/S, an operating company of the Ole Bull Academy, since 2004. He was trained by Anders Aasen in Eidfjord and has been active as a fiddle maker since the 1970s. Since then he has been learning the art of fiddle making from many others and has together with the Swedish fiddle maker Hans Lisper undertaken a study tour to Cremona, the "Mecca of violin making" in Italy.
He has made about 70 Hardanger fiddles, mostly after the model of Gunnar Røstad`s Hardanger fiddles from the beginning of the 20th century. For a period of ten years Sigvald was employed as a fiddle maker at the Valdres Folkemuseum, together with Olav Viken, Knut Opheimsbakken and Oddrun Hegge. At the same time he was running his own workshop in Voss.
Sigvald Rørlien has been teaching two students in Hardanger fiddle making at the Ole Bull Academy from 2005 to 2009. Ottar Kåsa has now made his own workshop in Bø in Telemark and Bård Riise Hoel works as Hardanger fiddle maker at Valdres Folkemuseum. Since 2014 Ole Gjerde has been a student within the Academy`s Bachelor program of traditional folk music, focusing on Hardanger fiddle making with Sigvald as a teacher.
Wiebke Lüders is a conservator of wooden musical instruments after studying at the Academy of Fine Arts in Vienna. She has worked as a freelance conservator in Vienna for several years and had a 1 1/2-year-long scholarship at the Conservation Department of the Metropolitan Museum of Art in New York. Since she started to work at the Academy's fiddle making workshop in January 2016 she has been specialising in the repair, conservation and making of Hardanger fiddles. She is also responsible for the maintenance of the collection of Hardanger fiddles and violins of the Ole Bull Academy.