Does anyone know where to get the type of sound deadening clothe wallpaper used in theaters? It's usually burgundy or black and it appears folded or tucked on the theater walls. It is usually only half way down the wall. I can't seem to find it, but maybe I am not searching with the right words.

Slack

I might use a product called "CrossPoint" acoustical wall fabric which is applied to the walls using adhesive.

http://www.acousticalsolutions.com/products/fabrics/crosspoint_fabrics.asp

Thanks.

You're not looking for fabric covered panels or the fabric you install over acoustic treatments? The product above will do nothing for sound deadening outside the room annd very, very little inside the room.