Most likely but it’s funnier if you don’t think about that.

So the majority of people agree on what exactly? What do they mean when they say something is morally right or ok?

That’s the next step. Once we agree that someone is right and someone is wrong, then we can start talking about the definition of “moral good”. And that is a very difficult and complicated discussion. But just because it’s hard to define doesn’t necessarily mean it’s not real.

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.