If the music is loud enough that you feel the base rumble through the floor, yes, that's an issue. If it's a little bit of music played but you can still have a conversation, that's fine.
again, if neighbours can hear it, it's not fine. And screaming children are not fine either (mum of 4 here...)
If you want to make noise, move to the middle of nowhere. If you chose to have neighbours, then behave.
Life is so much more pleasant when you are surrounded by considerate neighbours.
Who wants neighbours from hell, with 1 playing loud music, the other raving their car for hours whilst working on it, another one with screaming kids all day, and the one having late parties through the night and burning stinky rubbish all day.
The solution would be to put all these anti-social people in the same block tower or estate, and leave them to it. Sadly, we can't do that, so you'll just have to have some manners and consideration for others I am afraid.