Hi Raul;
I cannot answer the first two questions, Q is unknown to me and so are the workings of the Dynamic Boost effect (since I played no part whatsoever in developing the program).
So I’ll go ahead and tag @bvijay for you, perhaps he can answer those.
As to your third question about multiple outputs, I have no experience with that situation and there is no option for it in FxSound itself, but I’ll leave this thread open so other users can chime in, and there was a thread on that topic recently, see below.