I have a couple questions that might sound stupid but I don’t want to make any mistakes when building this room. I have a 12inch ceiling I need to insulate. To save money I was going to double up on R-19 instead of using R-38. IS there any disadvantage to doing this? When double drywalling, do you tape and joint compound the first layer of drywall before installing the second layer? The Lowes and Home Depot in my area don't carry/stock sound board. Is there something I can use that will serve the same purpose? Home Depot has a product called Homosate (it looks like compressed paper) but the salesperson at the Pro desk recommending my not using it. What device/product (remote control if possible) can I purchase to control all of the lighting in my HT room? I am going to have 4 different light sources.