PASP is awesome but it just scratches the surface. You will need to dive into papers to make any headway - there is a ton of research but there is no "toolkit"

PASP is awesome but it just scratches the surface. You will need to dive into papers to make any headway - there is a ton of research but there is no "toolkit" for doing it because it's comparatively a niche thing to do. You will probably also want to reference the author's other books on digital filters and computer audio. There is also no consensus on the "best" techniques, so you read papers until you find a technique you can adapt to the modeling framework you've built, implement, repeat. Physical modeling can be done on a modern computer in realtime (for example, my VST instrument models a 6-string guitar, with a litany of modeling features, at about 3-4x realtime at 96kHz, and I have plans to expand that to a whole piano at roughly the same computational cost). But you will have to be quite good at DSP engineering to be able to meet the realtime requirements - this is similarly high-performance as graphics programming or any other kind of modeling code. You can also build toy models in Python or MATLAB and run them offline, but this is not nearly as much fun.