If you really complained to the police and got the brush off, you need to get in contact with a high ranking officer and complain to him. Surely they have a complaint department and if you file a complaint every single time they play loud music and you get the brush off, it will become apparent that someone is not doing their job correctly. If the police ‘do not have time’ for police matters, you need to find out who your congressmen is and get in touch with them. How many times have you gotten the brush off? Have you gotten the persons name and badge number (or employee ID number)?
You do not need to go to the landlord. There is nothing he can legally do outside the clauses in his rental contract. Besides that, he probably doesn’t care about your problem.
If they really bother you to the point of breaking the law, why not just murder them? You seem pretty intent on doing something illegal, so why not amp it up a notch?