Had the police come over due to neighbor complaints. We play in a two car garage with insulation and drywall. The real problem seems to be too much noise is escaping though the garage door and the guy across the street can hear it. I walked around outside the garage while the other members of the band practiced and it wasn't bad on outside the finished walls. I've checked on the web and know all about the making a room within a room thing. That would just be too expensive and a huge hassle. I've also found something I would really like to try at acousticsolutions.com some acoustic blankets that can be put over a frame to make a room or just a wall of blankets over a garage door. But again it's just too much moola right now. I was thinking of trying to get some wool blankets from an army surplus store or something and make a curtain of several layers in front of the garage door. I know it won't completely stop the sound but I'm hoping it attenuates it enough so that the the neighbor doesn't complain. (hes the only one as he is in direct line with our garage door.) We don't play too loud, we use those bose systems, but the things throw like all hell. Does anyone have any experience trying wool blankets, and if so what was the end result??