Jos Janssen Arnhem 1953, Sonologist, Gamelan, documentaries and Sound Engineer. Studied Electronic and Computer music at the Institute for Sonology at the State University of Utrecht and Gendher at the ASKI Academy in Solo, Java. At the Institute for Sonology he was for a number of years a student assistant to Dr. Werner Kaegi, a pioneer of Computermusic. He is specialized in computer sound synthesis (MIDIM / VOSIM) and uses these techniques in his compositions and radiophonic works. From 1983 untill 2000, Jos Janssen and Paul Goodman have collaborated as a composers duo on a series of compositions and radio plays which have been presented and commissioned by the Dutch radio stations the Concertzender and the VPRO/NPS a.o. at the EBU festival (Luigi Russolo) in Rome, 1993 , The #aetherfest festval for radio art, Albuquerque and the Sender Freies Berlin. His main interest is Electro-acoustic music using ethnic elements. He was a part-time engineer for the Indonesian Mediation project and the Signs of Crises project of the University of Leiden. As he is also specialized in Javanese Gamelan music, he has made many radio programs for the VPRO radio 4, Sender Freies Berlin and the WDR Cologne, and produced the 3-CD set "Dewa Ruci" performed by KI Anom Soeroto. He is the founder of the Studio JHW Janssen sa, a private studio for computer music and research. Since 2005 he works together with Martin van den Oever on a series of documentaries about the war with Indonesia. At the moment (2015) their documentary Libera Me, one should know its history is in the exhibition War! From Indie to Indonesia 1945 - 1950 in Museum Bronbeek, Arnhem.