What should I do about my roommates music?

My roommate listens to hip hop, and I have no problem with that. He brought his really good not to mention expensive sound system which doesn’t work with my iPhone for some reason, which is besides the point because I really don’t mind his music. I would play my own music (alt rock) but I need my phone by me at all times, not at the other end of the room on the dock.

But what really pisses me off is that he plays the same 12–15 songs over and over again. It’s really getting on my nerves, and I just want some variation.

If I knew anything about hip hop, I would make a playlist for him, but unfortunately that is not the case. Is there anything I can do?