By creating conducted instant compositions, the VIO engages in a special discourse of experimental composition and complex improvised music for large ensemble: absolute ad hoc, musicians and instant composition conductor create momentary compositions in an oscillating process of ensemble-improvisation and structure-giving conducting, by means of hand-signs for f.e. dynamic, pitch or duration. A method, connected to developments by Bruno Maderna, John Zorn and above all Lawrence D. Morris, performed by the VIO as an absolute ad hoc praxis. – Terrain for an unforseen universe of possible sound-spaces and -images, potentiated by the fact, that every performance offers ever new constellations of musicians and usually opens the door for at least one new musician.

The VIO was a guest at Moers Festival, Wien Modern or Artacts as well as important venues of the fine arts. Founder Michael Fischer works on the speech immanence of sounds and their dramatic evidence on tenor saxophone/feedback-saxophone, on soundscapes and as instant composition conductor with improvisation orchestras and temporary large ensemble for international festivals and guest-lectures. In 2004 he founded the VIO; it is one of the first continuously working improvisation orchestras in Europe.