Rich Eakin, Master student working at the MTG, has updated the open source Spectral Modeling Synthesis C software library originally developed by Xavier Serra for his PhD thesis in 1989. The library, called libsms, is distributed with source code and under GNU license and it has been tested with Ubuntu. Rich has also added a Pd (Pure Data) library of externals alongside libsms to be used for real-time applications.

libsms page