And about MIR, I'm pretty sure I'm right instead 😊 MIR makes ambisonics computing simulating the propagation of the sound of instruments and "virtual microphones" patterns that catch the sound. You don't see that, because you get a"stereo decoding" as result. I hope someone will correct me if I'm wrong.
As far as I understood it, MIR does not rely in any way on different (virtual) Microphone positions, but calculate the acoustic reflections of a "Source" depending to its position in the room nevertheless "recorded" by only one Stereomicrophone. I hope someone will correct me if I'm wrong.
If I remeber right Dietz has already experimented (inhouse only) with a Multimicrophone Version of Mir, which gave several complex possible simulation problems to solve that he rejected to develop anything like that for the user. However what we currently are able to mix in MIR is nothing more than the Dry + wet ratio.