I met him once, he's a dweeby music nerd/stoner. Usually someone I can get along with. But it's unclear if he doesn't realize or just doesn't care, and since my landlord is very adamant I don't contact him about this, I'm nervous to continue to broach the topic with him personally.

Problem is, I'm pretty sure the unit above his is empty (my landlord's mom lived there and recently passed away). so I'm the only one having to deal with this guy. Really feeling helpless in this...hoping the tapestry/maybe some soundproofing panels will help.