Smith, Julius O. Physical Audio Signal Processing: for Virtual Musical Instruments and Digital Audio Effects, online book at http://ccrma.stanford.edu/~jos/pasp/, Center for Computer Research in Music and Acoustics (CCRMA), Stanford University.
Smith, Julius O. Physical Audio Signal Processing: for Virtual Musical Instruments and Digital Audio Effects, December 2005 Edition, online book at http://ccrma.stanford.edu/~jos/pasp05/, Center for Computer Research in Music and Acoustics (CCRMA), Stanford University, Dec. 2005.