2004
The 2004 paper by Freeman et al. details Auracle, a networked sound instrument designed to interpret vocalizations as gestural inputs rather than speech to control a software synthesizer. Developed alongside Max Neuhaus, the system utilizes PCA to map vocal pitch, loudness, and timbre to musical parameters, advancing the concept of networked, communal sound art. Detailed project documentation is available via the Auracle project website.