Did he measure the music level? (dB duh!) If he didn't he has no basis to cite you. It's like saying, yeah your music is loud...i don't know how loud but i'm guessing it's too loud so heres your ticket.It's not really there for your reading pleasure... it's just an accessory to my post. And if you look close enough, it says "Disorderly conduct (Loud Music)".
-Marcus