It is commonplace to say that opera and theatre are nowadays carried away in the comprehensive crisis of representation, which is balancing between two modalities: on the one hand, its traditional meaning, that is text representation, either play, libretto or score, which is central for actors, singers and members of the audience; on the other hand, multimedia representation, based on computerized interfaces that impose specific handling to users. 
Between the decline of the former, that can no longer be hidden, and the apogee of the immediate and predictable interaction modes of the latter, what can stage arts propose, without giving up text, even disrupted in its forms, and without ignoring possibilities of progressive building-up of meaning thanks to man to machine dialogue?
We propose nine texts and a CD-ROM to think about opera and theatre in the framework of performer to computer dialogue, starting from stage experiences either in digital opera Alma Sola or in inter-media theatre plays La Traversée de la nuit and Sur la lecture.
CD-ROM included