Right now I am recording/practicing in my basement, with concrete walls and floors. Recently I had an incident with the washing machine so I was thinking of building risers for the drums and amps, just to be safe. I was considering using 2x4s, getting everything about 4in off the ground then covering the tops with plywood and carpet. I was curious how this will affect the sound of the instruments for recording, I don't want everything to get all boomy. I was also wondering if it would help keep sound from leaking out of the basement.