Stay tuned. When the basic room is all done, it will be smooth bare walls all around. When the room was like that before, it was unbearably echo-y. I put some minimal treatments up on the wall and was happy with how it sounded. That said, I don't have a very refined ear, so as long as it's not on the extremes (totally dead or echo chamber) I'll probably be happy enough.I hope when all is said and done, you will like the sound of your drums. Seems to me, just guessing, the room will kill all resonance or echo.