Detached Theatre/Club House Soundproofing Advice?

 There are lots of places on the web where you can find much more details and info on the general principals of soundproofing in new construction....BUT...how we do it in music studio world follows some of these general methods...

You should really be building a wall within a wall.  The framing should be a double studded wall where the studs holding the inside wall do not connect to and are staggered from the studs supporting the outside wall.  the studs are further connected to the foundation with isolating connectors.  The floor joists are usually separated form the interior flooring with sound isolation connectors as well.

You can put insulation in the walls that is rated for better sound absorption.  There is a good one that is made from recycled blue jeans treated with an acid.  This stuff in between a wall like I described will absorb sound better than regular insulation...the acid treatment is resistant to termites and also makes it fireproof.  It won't burn.  it is great stuff.  

The biggest place where sound will escape a building/room is the windows and doors.  Use double paned "thick" windows rated for keeping the sound out.  These are also usually good for insulation as well so if you are doing it new....you might as well do it right.  

The ceiling also is an area to watch.  You can attach a ceiling to the top joists with an isolating track like system that will absorb the sound waves and not transmit them through the ceiling or roof above.  Use the same blue jean insulation above the ceiling as well so sound will not go into the roof area and then leak outside.  

Sound proof doors are expensive and usually double the thickness of a regular door.  At a minimum, don't use hollow core doors.  Use solid doors with good "weather" sealing around the door, especially the bottom of the door.  Any crack where sound can come through.  

High frequencies can be absorbed with some basic room treatments, but the low frequency stuff really needs mass (like heavy concrete, heavy furniture, etc...) and the other construction methods (like the "wall within a wall" construction) to keep it from getting out. 

I second what Brian has said. I will ask Adam Gregorich (one of the the owners of this site) the name of the guy he used to help set up his HT and will ask a couple of guys that have built separated buildings for their home theaters.

Sounds like it will be a great project. How about shooting some pictures and posting them on the forum as it is built.

Parker

A few comments here: Standard fiberglass (R-19 in a ceiling and R-13 in a wall) will work as well as any specialized insulation. There is certainly no need to pay a premium for insulation unless you're looking to avoid fiberglass, etc.

Room-within-a-room is a description for all 4 walls and ceiling being decoupled. Simple route is separate wood framing of the walls. Come in 1" from the existing open (insulated) studs and build a new framed wall. Insulate as well.  Apply double 5/8" drywall. Recommend damping also.

Ceiling can utilize floating joists or resilient clips and channel. Then apply double 5/8" as well.

No need to isolate the floor.