Thank you for your reply. They are adding a whole new audio DSP chain so it's possible to program your own plugins in C++ by just adding your own DSP algorithms so I'm guessing this should make Csound integration much easier. Have you watched the latest GDC presentation on the new audio engine? Very likely you had but just in case: https://www.youtube.com/watch?v=ErejaBCicds
In the case of using FMOD with UE4, I'm not experienced with it but from what I see it seems that each time an FMOD event triggers it reinitializes the Csound CSD, right? Does this mean that if I wanted to create a Csound/FMOD plugin that is always on, processing audio spatialization (ambisonic decoded to binaural), do I have to create an extremely long FMOD event? (not sure if this is even possible). Is there a way of having an FMOD event that is infinite and gets triggered once when UE4 starts playing?