loud music all night long

I am sorry you are going through that. Can't be any useful purpose for loud noise at that time of morning. It used to be the case occasionally for me in Las Mesas when the fairs would set up in the basin near La Noria/fishing lagoon on the side of the entrance to Cinco de Mayo. Not sure what happened but the carnivals or fairs that have set up down below have been mostly quiet after 10 pm this year.

Maybe there is a local political way to deal with the problem?