For many years, Jean-François Madeuf has worked together in researching with a large number of  specialized third parties…

• Instrument museums, such as the Cité de la Musique in Paris, and the universities of Edinburgh, Brüssel, Basel, Nürnberg or Berlin
• Instrument makers such as Graham Nicholson (Den Haag), Rainer Egger (Basel), Markus Raquet (Bamberg), Aron Vajna (Basel)
• Publishers and periodicals such as Musica Rara, Ut-Orpheus, Späth-Schmid, Early Music, la Gazette des Cuivres, Brass Bulletin or Larigot…

… for Researches that he carries through and is now combining for a doctor’s degree at Koninklijk Conservatorium Brussel and Vrije Universiteit Brussel concerning the playing of natural trumpet.