Green glue between 2 levels of dry wall works well. A separate wall, decoupled from the first is an excellent idea as long as you do not triple leaf. Go to the website for The Sound Proofing Company and read their explanations in Sound Proofing 101. As Microstrip said, it is a complicated issue and many of the simple solutions (insulation between studs) really do not work very well, especially for bass.
Soundproof material for a dedicated room
I'm thinking of converting one of my rooms to dedicated audio room. Since it's a condo and there are neighbours to the side of me on 2 sides, I'm trying to figure out what I could put on the walls to prevent the sound going next door. Can I get away with just gluing something on the walls or would it help if I built a wall on top of the existing one and put something inbetween. Looking for something that won't break the bank, but also something that is effective. Waf is non-issue. What soundproof product or materials would you guys recommend?
Thank you all for your inputs
Thank you all for your inputs