Auracle is a "group instrument," controlled by the voice, for real-time, interactive, distributed music making over the Internet. It is implemented in the Java programming language using a combination of publicly available libraries (JSyn and TransJam) and custom-built components. This paper describes how the various pieces --- the voice analysis, network communication, and sound synthesis --- are individually built and how they are combined to form Auracle.

Graph Theory links the creative music-making activities of web site visitors to the dynamic generation of an instrumental score for solo violin. Participants use a web-based interface to navigate among short, looping musical fragments to create their own unique path through the open-form composition. Before each concert performance, the violinist prints out a new copy of the score that orders the fragments based on the decisions made by web visitors.