Muslims say that music is Haram because it is said so in Hadith, does that make music objectively wrong?
That is the exact opposite of what the above comment said. An objective view of morality would say that the “rightness” or “wrongness” of the act of making music is an objective truth. If music is “right”, then music is right, regardless of what Muslims or any other people say, and vice versa.
It means you can’t come to a correct moral judgement just by taking a poll of the people around you.