Oh man, if they can... Maglor's hunting a group, gets up close to fight them and hears this music. Eery stuff. But while it makes the hair on his neck stand up, it also seems to coincide with the orcs stopping and just... laying down and going still.
And if there are any orcs he can't control for reasons, or goblins that come around to make problems, well... there are always the people they've killed to wake up and help.