Obertone Audio has released PhysiX, a free VSTi for Windows that does true physical modelling using the "nodes and mass model". It simulates up to 64 nodes per voice and "true physical inter-modulation coupling" (one swinging wave affects the behaviour of the others).
- Unusual sound.
- 23 different node and mass models.
- 11 different excitement modes.
- 2 wave coupling modes.