Doubles is an electronic music instrument with a tangible user interface. Using two physical objects on a table, several simultaneous performers can interact with the instrument which registers the speed, distance, and motion of the objects. The surface of the table is paved with beads that roll when the physical objects are moved. This creates a sliding effect of acceleration and a centrifugal force is created to compute the audio and visuals in the installation. Check out the video below to see the visuals and hear the strange sounds produced by the instrument.

[youtube]http://www.youtube.com/watch?v=GeHkyjoKj9U[/youtube]

This work applies the philosophy from “tai chi”: “It is neither existing nor not existing.” The interactive factors and feedback answer the philosophy aptly. It is based on the simple principle that the rolling of a bead will lead to reduction in friction. When the player makes the physical objects move a sliding effect of acceleration and centrifugal force is created to compute the audio and visual effect in the installation. More info can be found on the official website.