I took everything out of my closet to make a booth. I only want to use it for a vocal booth. Im not using no instruments, just putting in a stand with my audio technica's 4047. It fits 2 people, but one fits perfectly to move around, swing arms, etc... The booth is about 7 to 8 feet tall, 4 feet in length, and 2 feet wide. I dont have no ducts...my closet door will remain open when booth is not in use. So now, what will go on the walls. Should I just use some type of foam by itself, or should I put something before the foam, like some type of wood? I've heard of Plywood and fiberglass...but I don't know what these are used for. (sorry if its a dumb question). What should I use on the floor? Should the closet door get the same treatment as the walls? Anything else I sould know or do?