Physical Modelling isn't new, companies like Roland, Yamaha Korg, and Nord have been some of the companies to use the technology over the years in various synths and pianos.
Physical Audio hopes to harness the technology to give synth lovers another tool in their sonic palette with the Derailer plug-in and for those wanting to know more, there is a public beta that is free to download. This is what they say;
Derailer is a physical modelling system with two basic elements. One is a metal bar that you can strike or bow. The other is a nonlinear mass/spring connection. This allows you to join two bars together so that vibrations from one create sympathetic resonance in the other. By connecting multiple bars you can create new instruments that have their own unique sound.
There are 37 strike bars, 5 resonators, and up to 81 connections to play with. The adjustable physical parameters and nonlinearity of the connections produce a wide range of tonal variation that reacts to striking velocity or bowing pressure.
Even better they've got a nice demo online of it being used with the ROLI Seaboard.
Derailer is currently in beta, and is free to use.
System requirements: macOS 10.9 ~ 10.12
A Sandy Bridge or newer processor*