Keyword(s):Mapping , Controller , Sound Shaping
The authors define a two-axis transparency framework that can be used as a predictor of the expressivity of a musical device. One axis is the player’s transparency scale, while the other is the audience’s transparency scale. Through consideration of both traditional instruments and new technology-driven interfaces, they explore the role that metaphor plays in developing expressive devices. Metaphor depends on a literature, which forms the basis for making transparent device mappings. Four examples of systems that use metaphor: Iamascope, Sound Sculpting, MetaMuse and Glove-TalkII are examined and discussed in terms of implications on transparency and expressivity. The authors believe this theory provides a framework for design and evaluation of new human-machine and human-human interactions, including musical instruments.