AVS, here's my current basement floor plan. The walls are 1/2" Sheetrock with no insulation other than around the foundation perimeter with plastic barrier. The floor is concrete slab and the majority of the studs are metal. It is a very 'live' room, especially the stairwell acting as a nice echo chamber. Anything approaching 'theater' level SPLs are heard throughout the house. The living room is directly above the theater, and bedroom are two floors above.
Before I even ask the question, I know that the answer will be "it depends." But, I'm going to ask it anyway: Can a happy medium be found with regards to sound escaping an open floor plan such as what I have? Obviously, if I were to make a 'box' to house the theater, it would be the best solution to sound, but not with the desire to keep it somewhat open.
What I am considering, is to do the full monty (DD, GG, clips/channels, Roxul) on the ceiling and 3.5 walls surrounding the theater area...that is a given. Beyond that, I'm seeking opinions on what to do with the rest. If I leave the rest as is, I'm thinking that all my work/$ in the theater area will essentially be negated.
Let me know...this is a three year plan (2.5 of those involve saving up the $ needed).
Thank you in advance!