https://phys.org/news/2019-03-role-intuition-music.html > In human-computer interaction, interface metaphors provide users with a way to interact with the machine that resembles a known activity. These metaphors are widely used in digital musical instruments. In this study, the authors used the conductor metaphor. The interest in using these metaphors is so that the user, in a virtual facility in which to control the tempo and dynamics at which an orchestra plays, can apply their knowledge or their prior intuition about how a certain activity functions in the real world—in this case, conducting an orchestra. > "From the research point of view, in this study, we were interested in determining how intuitive notions available to users of this kind of facility may be explicitly used by the system to respond to their gestures of conducting an orchestra more intuitively, and therefore, may provide a more expressive performance," says Sarasúa.