In the question http://188.8.131.52/questions/question/forum-38326, Gino gave some details on how the 3D panning is implemented. He said
FMOD Studio’s panner effect module can be swapped out with custom
spatialization plugins which will also listen to the position of the
event. Plugins can therefore be used to perform HRTFs, geometry-based
early reflections, distance filtering, etc…
How does one create a new 3D panner that replaces the default 3D panner? I can see from the fmod_distance_filter plugin how to access the 3D attributes of the attached event, but it’s not clear to me how that interacts with the existing 3D panner.