The VOSIM Sound Synthesis System
The VOSIM model is invented by Werner Kaegi in the sixties and seventies and was published the first time in 1973. Kaegi worked with the VOSIM model in the very early time of digitalization on two DEC-PDP-15 computers. Thanks to the wonderful collaboration with technicians and his college Stan Tempelaars of the Institute of Sonology he could develop a state-of-the-art system of soft- and hardware.
The VOSIM-system was first implemented in two parallel hardware generators, which could be controlled from the DEC computers. Between 1973 and 1980 Kaegi developped his composition-system MIDIM to feed the generators. In the many years the setup functioned, hundreds of international and national students/composers followed the lectures Kaegi gave and many compositions were created with MIDIM/VOSIM.
The VOSIM gained international interest as one of the promising sound synthesis systems. Kaegi was at that time present at all the main congresses in the field and his sound examples made a wide impression on colleagues in the field of music, but also in speech synthesis.
The MIDIM-system was entirely programmed in FORTRAN and after the closure of the Institute of Sonology in Utrecht, the system ran for some more years on Atari ST computers.
If you are interested in VOSIM, there are some programs available (see download).
ARTICLES:
>>> VOSIM-A New Sound Synthesis System (Interface 1978)
>>> MIDIM/VOSIM Reports (Interface 1986)
On 16 March 2024, Werner Kaegi passed away in South of France at the age of 97. His passing leaves a huge gap in the lives of his family and friends, as well as his professional successors. You can react to his death via the contact form.
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Summer 2023 Archivation of Master Tapes
The tape archive of Werner Kaegis works is incorporated in the Sonology Archive in The Hague. The main works will be digitalized from the original master tapes. We hope that most of the electronic works will be published in the next years!! We are very happy that finally this wonderful material can be saved for the future.
VOSIM66 software and Vosim Website by Heinerich Kaegi and Ludger Hurts
Between 2020 and 2026 Heinerich Kaegi and Ludger Hurts developed a new Vosim programm VOSIM66 based on the original ideas of Werner Kaegis Vosim and Midim systems. This programm is created in GNU Octave and runs on Windows, Mac. It's open source and is available via www.vosim.eu
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