Originally Posted by mistaforty
I was leaning towards putting quiet rock over the existing drywall. The media room came as part of the finished basement so I'm facing some odd challenges in making it the way I want.
Adding additional mass and dampening to the walls will obviously improve the sound containment capability of the room. However you need to be realistic about your expectations and if your goal is to make the rest of the house dead quiet, it probably isn't going to get you there.
As I look at your pictures here are some of the ways sound can get out and about and what to do about it.
Vibration of walls and ceiling due to firmly connected drywall will transfer to floors and walls in the rooms above turning them into passive radiators, If you have wood/tile floors above it will be a big issue. Adding more damped drywall is good, removing the existing drywall and adding isolation clips and channel then replacing drywall with multiple layers of damped drywall.
Holes in the drywall shell for lights and electrical penetrations not treated, When the drywall is down build backer boxes and apply putty pads.
Standard interior door without seals, Replace with a 1 3/4 solid core door with airtight seals on all four edges.
An undetermined HVAC system that can act as pathways for the sound to get to the rest of the house. Replace part of the ductwork with acoustical duct and use dead vents (site built duct mufflers) if possible