Thinking about better soundproofing of home theater rather late in the game. Its really only the 3 small rooms underneath that need to think about. Rockwool is already specced but I am thinking maybe I should think about resilient bars and double slab drywall for the ceilings of the rooms below. The thing is, is that the drywall stud walls of the rooms below have already gone up, attached to the floor joists of the Home theater. Seeing as the walls of the rooms below are can conduct vibration from the theater room floor, is there any point in using resilient bars and double slab drywall on the ceilings of these 3 rooms. ie is the sound from the home theater just going to bypass the double slab resilient bar ceilings and vibrate out through the stub walls of the rooms rendering the ceiling treatment a waste of time?