I have done several image filters, and I would like to know if there are any good articles about audio filters, and maybe how to do it in DirectX, if I'm not asking for too much.

Also, I'm interested in knowing if there is something similar to raytracing, but for audio. I mean, an algorithm that simulates sounds according to physics of sound (not light), derivated from events like friction, air compression, resonance, etc... Would this technology be called "soundtracing"? Is it already developed? Maybe physics accelerating devices must enhance a few generations to be able to simulate something like that, what do you think?