My band practices in my attic. Theres not much insulation in the roof. Its just plywood and shingles. The sound from the drums and bass can get kind of loud outside. You can hear us one street up and one of my neighbors has complained to me about the noise. My band would really like to continue to practice there since we have plenty of space, couches, chairs, shelves, etc. So, I am looking for some kind of inexpensive soundproofing solution. Anyone have any recommendations? Thanks!