Real Time Extended Physical Models for the Composer and Performer

In this paper we describe compositional and performancerelated issues for exploring extended techniques of a bowed string physical model. First, an extended waveguide physical model of a bowed string instrument was created. To explore new techniques for the physical model we perform it with the metasaxophone, a tenor saxophone retrofitted with an array of sensors tracking continuously changing performance data from the instrument in real time. Through instrumental controller substitution the physical model is forced to function in a different expressive space, and new timbral possibilities were therefore created.