GIK Vicoustic and others

@ei001h

Double drywall does work (Quiet rock is the bomb, Home Depot) I did that and used green glue between the layers. I also had spray foam installed and then rock wool on top of that on all walls and ceiling before drywall. Prior to drywall going up it was eerily so quiet that it was actually disturbing because of no reflections at all.

If you’re going to do it might as well do it right. BTW I have more than a case of Green Glue left over if your interested.

Regards,

barts

@ei001h 

"why double dry wall if you’re already using rock wool ? Where did you instal spray foam ? Why is glue important?"

I live in a quiet  neighborhood, but there are still neighbors with leave blowers, chain saws etc and the ever present AC compressors.
So I double studded the room which left enough room for spray foam (do not do this your self) and rockwool.  Then double "Quiet Rock" dry wall with green glue in the middle. Makes for rather wide window sills!

To answer your questions directly: I made the room as sound-proof as possible.
The spray foam and rock wool are admittedly overkill, but I had to have some insulation as it's an above ground room on a slab.

Order of events was: double framing then spray foam then rockwool then Quiet Rock then Green glue then quiet rock.

Green Glue may or may not be important to you...my system can easily overload the room so I'm throwing the kitchen sink at SOUND PROOFING.  Not to be confused with acoustic treatments. 

To be clear: my goal was to make the room impervious to external noise, and secondarily to music escaping.  The room is dead quiet which IMO will raise the level of any set-up you end-up with.  

You're on the right path.

Regards,
barts

@8th-note 

I agree with your sentiment...but this is not a one-size-fits-all arrangement.
This (essentially) is what we signed up for!  If the listening room doesn't require
aggressive SOUND-PROOFING then your good.

If external noise invasion is not present (it's virtually not in my case) and there's no issue with music escaping into the internal environ you are good to go and your advice should be heeded.

Regards,
barts