| Résumé |
The creation of an interactive system depends on
various expertises. In fact, artists usually collaborate with
engineers and technicians who design and implement the final
system. Therefore, the same interactive system can be viewed, and
evaluated, from different perspectives. In this paper we consider two
main perspectives: the system design and the semantical points of
view. The system design perspective encompasses the discussion of
topics such as: choice of sensors and feedback, techniques used to
analyze the signals output by the sensors, strategies to map sensor
variables to sound generation parameters, and sound synthesis
techniques. The semantical point of view, on the other hand, focus
on: role of the users, types of actions/gesture/postures to be used
for the interaction, goal of the interaction, and role of sound output
in the interaction context. We analyze each perspective in detail
considering two case studies: interactive sound installations and
interactive instrument performances.
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