My home theatre room with 7.1.4 Dolby Atmos.

Just a short video of my setup. The room is separate from the house made from Besser Block filled with concrete. It was rendered with solid plaster on the outside and Finished off with Granosite. It has 2 layers of boral soundstop plasterboard which is 26mm thick on ceilings and walls. The total thickness of the walls are 246mm thick. I have no problems in keeping the sound in as I have lined the walls with industrial grade absorption. No sound escapes the room.
The room is not completely dead for sound hence the tiles around the perimeter.The carpet is made by Axminster and the room is 8.5 metres by 5.5 meters wide. The celing height is 2.4.