: This paper presents a new theoretical model for audience participation in the context of HCI. Such a model is necessary because, while a great amount of new interactive solutions are unveiled each year, the assumptions in regards to users’ roles remain largely unchanged since the dawn of the computer era. This paper questions these roles and articulates a number of principles that interactive environments must employ to bring about new audiences – active communities based on the principles of non-idiomatic improvisation. This theoretical exercise is supplemented by a brief description of the Emonic Environment, our system for creation, modification, exchange, and performance of audiovisual media in an improvisational fashion. The paper concludes with a description of system’s ongoing expansion into the domain of mobile multi-user collaboration.