This work aims at investigating the relationship between creation and fruition of art in interactive installations that exhibit intelligent responsiveness to participant input. A practice-based research led to the development of an interactive environment, in which the audience members are partners in constructing meanings and producing contents. The presented piece Which is your brass voice? employs artificial intelligence techniques to create unique multi-sensory experience for the audience. The artificial intelligence behind the artwork analyses the individual nuances of people's voices and creates a new music composition in real time on the base of its vast musical knowledge. User input is transformed into sound and coloured lights for further exploration of computer mediated aesthetic experiences. A brief description of the technical system is also included.