programmed the 3d audio, it was fun, still no audio raytracing, but i got a good foundation
i did add binaural panning; and you may have heard about the medical prop-- jk
so binaural panning is a headphone specific 3d sound concept
using a function (HRTF) to create a delay between each headphones of the size of the average human head, enabling illusion that sound has location on x plane
this is how counterstrike is a stealth game, and why you got kicked for saying you didnt have headphones