I found out recently you can synthesize something of a postional sound with blender, since you can render 4-channel audio within blender, (I am guessing WXYZ but its not ambisonic).:
Just needs converting to a 16bit 44.1k which high fidelity uses (I think its 32 bit by default from blender). Separately, you can also convert the 4 channel wav file into an amb file via a perl script I found, but hifi accepts the wav, so didnt bother. Need to read up on it more.
But the question was injecting it via Assignment Client scripts to the Audio mixer though. Right now I just have a simple entity using the ambient sound sscript… but not sure if thats the effect I want to put.)
You can hear the use at my domain, Nexus.