I recently bought a new mattress so I have a 4 inch foam top just sitting in my garage. If I cut that into squares and cut them into 2 inch thick pieces would that be good for acoustic sound proofing, or whatever you may call it. I don't mean sound proofing, but sound bouncing off the walls. I was thinking of getting cheep sheets and wrapping them so they at least look nice as well. Also, I am thinking that would be for around my actually monitors and in the room I want to record with (drums, vocals etc) hang my extra comforters/blankets on the walls in that room to deaden the sound. Any input on this would be awesome.