Hi all...I was wondering if anyone could provide some insight into acoustically insulating an existing room in a residential structure. First...I have read the FAQ and found the Acoustic101 link a great resource. I am an architect by day (and night!) and I've worked previously in the construction industry so I have a decent understanding of my options for permanent modifications. I am interested in some less invasive methods of insulating one of the bedrooms in a house. Just to throw out some ideas, which may or may not prove out, I'm considering furring the walls to achieve an acoustic 'sandwich' of insulation and gyp board. I'm also considering the idea of designing and building fabric covered panels which I would affix to the walls and ceiling that I could always remove more easily in the future. Either method would include 'plugs' for the windows. Anyone have success in achieving a tight enough barrier (with less permanent modification) to prevent a drum kit and amplified bass from leaking enough to disturb neighbors? My present mindset is that I will save the all-out acoustically separated studio for when I design a house to have built or make the decision for major renovation of this one, which is an older house. Thanks for sharing any insight!