Thought about adding a layer of mlv in my HT. You'll have to let me know if it helps. I'm going to push safe and sound against the subflooring then put the regular insulation back in beneath that and the ceiling drywall. Trying to dampen the sounds going through the two floors as much as possible. Also adding two layers of 5/8 drywall. I'll use safe and sound in the wall studs.
LFR1100 VP180HP EP600 M3 In Ceiling x 4 M5OW M2 - Atmos rears ADA1500.5 M3 Outdoor Speakers ADA 1000.8