Computational Physical Models Suitable as Real-Time Synthesis Models

• Digital filters from Finite Differences
• Wave Digital Filters (WDF)
• Digital Waveguide Mesh (DWM) for

All are special cases of finite difference schemes.
All are digital filters of one type or another.

Historical examples:

• Kelly-Lochbaum vocal-tract model
• Linear Prediction voice models
• Ladder and Lattice digital filter structures
• Formant filter-bank speech model
  (``modal representation'')
• Digital waveguide models
  (winds, strings, voice, membranes, ...)