What does Free Improvisation mean?
Free improvisation or free music is improvised music without any rules beyond the taste or inclination of the musician(s) involved; in many cases the musicians make an active effort to avoiding overt references to recognizable musical genres. The term is somewhat paradoxical, since it can be considered both as a technique (employed by any musician who wishes to disregard rigid genres and forms) and as a recognizable genre in its own right ...
(Wikipedia: Free improvisation).
Free improvisation particularly in an improvisers orchestra means mainly to hear and to play for the general view. While working with an improvising conductor you have to be present to every moment, also when you don't play.
The best example for such an improvisers orchestra is the
Here are some concrete examples what it means:
+ Playing without written music
+ To be authentic, self-responsible and flexible to what is to do
+ Particularly open-eared and open-minded
+ To know the conducting signals
Links and statements
General
Groups and orchestras
Musicians
Festivals
List of free improvising musicians and groups