How to make "Press any key to start" functionality to be enabled only on title scene and not on other scenes?

Hello! I have a problem here. When I am transitioning between Title scene and main menu scene with “Press any key to start” key the main menu scenes loads but when I click or press any key on my Main menu scene i still hear the background music that I have added over and over. Why that’s happening? I want it only to be enabled one time and load the main menu scene. I don’t want it to be enabled when I click left mouse button on main menu.