When I made the film Open Opera, I wanted the different stages of the destruction of destruction to be organized based on random games, mostly childish.  I therefore displayed signs on a wall of the workshop that determine the path of the character in charge of this mission.

So I created these signs. They are diptychs, because I considered that they should be opened on two proposals of action in order to broaden the game scope. Under each of them was a mode of action to be carried out and the instrument to be used.  I named them Formants. This term is a reference to that used by Boulez in his Third Sonata.  This composer created a piece for piano in which various paths are proposed to the performer.  It is an open work in which the proposals made to the pianist are innumerable.