Interactive Scores (IS) are a formalism for the design and performance of interactive multimedia scenarios. IS provide temporal relations (TR), but they cannot represent conditional branching and TRs simultaneously. We propose an extension to 's IS model by including a condition on the TRs. We found out that in order to have a coherent model in all possible scenarios, durations must be flexible; however, sometimes it is possible to have fixed durations. To show the relevance of our model, we modeled an existing multimedia installation called Mariona. In Mariona there is choice, random durations and loops. Whether we can represent all the TRs available in 's model into ours, or we have to choose between a timed conditional branching model and a pure temporal model before writing a scenario, still remains as an open question.
An application to define a hierarchy and temporal relations among temporal objects is OpenMusic Maquettes @cite_1 . Unfortunately, OpenMusic is designed for composition and not real-time interaction.
@cite_1
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This paper presents the computer-assisted composition environment OpenMusic and introduces OM 5.0, a new cross-platform release. The characteristics of this system will be exposed, with examples of applications in music composition and analysis.