I'd make the call if it is frustrating you. There is a time and a place for loud music and after a reasonable time it is only fair that the noise is turned down. If people want to go on partying they can move on to a venue but residentially, it is not fair to keep everyone awake, keep people drinking and possibly getting out of control.

With regards to the question of asking yourself or calling the cops, it depends on whether you know the people or not and what time it is. If I do know them or it is only early (11 - 12) I might drop by to ask them to turn the volume down but if they haven't had the decency to inform me of the party, if they are unknown to me or if it is too late and there is a possibility of aggressive drunken party goes on mass I would call the cops. There is nothing worse than a revved up group of drunks and I'm not willing to take them on. I also don't want to invite vandalism in my streets. After living inner city for the past 20 years I am sick of waking up and finding junk thrown into my yard, things stolen from the yard, cars vandalized, bins emptied or stolen and general trashing from drunks in the night (maybe I am a bit burnt and bitter from past experience!) I always make a call now early on before a party gets too drunk and out of control. I am sick of letting it slide and paying the price later for that 'generosity'. And I do make that call now as seems to me that everybody else thinks that someone else will make a call to the cops and nobody does. We all sit at home stewing about the noise and getting frustrated believing that surely someone has complained.

Don't get me wrong, I support a party but I just think that a lot of people get inconvenienced when things go on too long. So, in short, no, I don't think you should suck it up, especially when you are dealing with a baby and sleep deprivation.