Context - my computer sits on one side of a paper thin wall. His bed is on that direct other side. He's has talked to me previously about the sound on my computer being too Loud. He works night shift so he has to sleep during the day sometimes as I also work the night shift. 

  This week mid day (11am-4pm) I'm watching a YouTube video and hear a loud pounding noise coming from the other side of the wall, my roommates room. I immediately lower the volume because I never had the intention of waking him up. He then send me a message that he's not mad just being assertive since I seem to forget that he needs to sleep. This I understand for the most part. To me banging on someone wall is extremely rude and uncalled for. I respond saying that it is unacceptable to bang on my wall and that I would like to speak with him to find a solution to this issue we keep having. I didn't not state a specific solution as I said I didn't care what the solution was. 
He states that since words seem to do nothing he'll continue to bang on my wall until my behavior changes. I feel now as if I'm being treated like a kid "I will continue to bang on your wall until your behavior changes". After a few messages back I state that I would be willing to move my computer as I think the issue is how close it is to his wall. My volume was not loud on my computer to begin with. But due to the walls being so thin it probably comes off loud. He says the only issue is volume and that he's said ask he has to say and that's it. He has also said he doesn't want any beef or animosity. For me banging on the wall does not. Am I supposed to hang on his wall if wakes me up? Do I turn my volume up to piss him off more? I don't like either of those. He doesn't see why I'm upset. I'm willing to move my stuff to the other side of the room. I'm not sure if he understands why I'm upset. Am I the a**hole?