Kader's Profile

This is tough, especially in a rental. I own a theater, and we've been dealing with soundproofing issues for the better part of two years. I like the stuff that they have:
http://www.soundproofcow.com/
However, to properly soundproof a room, you need access to the studs, so if you're a renter, that's out. Buy some eggshell composite, liquid nail it to cardboard, and nail it to the wall.
But if it's repetitive, loud beats, that kind of thing will make your neighbors not like you. Anything with shared joists or shared walls are out - loud bass will go through the walls (and your neighbors spines). And if they have a small child, you're done for.
Take the house and soundproof the studio the best you can. Good luck!

I don't get this, either. It looks like a bunch of college interns did it.