Music is something that has been pretty much ingrained into our society, and is as well in many others around the world. But no one really stops to ask "Why does this sound so good?" What is it that makes music sound good, or bad? The answer is pretty obvious because this is A-Plus physics so, duh, it's physics (and technically it also has to do with the music popular in the current society but that's psychology and sociology so we won't get into that). Sound comes from sound waves sent through the air, which vibrate at different frequencies. Music is just a thought out combination of these frequencies that pair together well.