I'm currently in process of modifying blueprints of the new house for my wife and I. We are building a ranch house that will have the home theater installed into the great room temporarily while I design and finish of the section of basement I want for the New theater room. I'm getting 14 courses high of block on the foundation for a higher that normal ceiling in case I need the room for isolating sound from the rest of the house. Questions: I want to be able to play the theater at reference levels and effectively isolate sound from the up stairs. What methods and materials are available to do this? I' going to use a corner of the basement as two of the walls. Should I also use concrete block on the other two inside walls to help isolate low bass sound from the rest of the house? Any suggestions would be appreciated.