How to control backsound on/off in the third scene

I want to make a game, it’s almost finish. now I’m trying to control the sound of the game. I already watch many videos but I am still confused.

So the problem is I already have the audio. Then I have the Main Menu and the settings scene. I want to control the audio in the setting scene but I can’t insert the gameObject from the Main menu scene to The setting scene. I’m still new to Unity so please help me find the Answer, Thank you.

You need to make new object with new script, and connect all sound to this gameobject.
You need to use DontDestroyOnLoad