Anyone who has spent much time in Mexico knows what that bell means. It's time to bring out your garbage. In some neighborhoods the garbage truck is following the bell ringer down the street. In Alejandro's neighborhood, the truck is parked around the corner, and the residents come out with their trash and take it to the truck. Garbage collection is done on a daily basis.
Perhaps I will have a chance to record some more of the unique Mexican street sounds before this trip is over.