http://www-ccrma.stanford.edu/~jos/waveguide/Kelly_Lochbaum_One_Multiply_Scattering.html ...you're welcome! ---------------------------------------------------- Bradley J Zimring 2226 Wellesley / Palo Alto, CA 94306 ********************************************************** Center for Computer Research in Music and Acoustics http://www-ccrma.stanford.edu/~bzimring/music <=original compositions<=