Need sound clip to stop if returning to the slide
I am working on a course with 4 lessons and a Main Menu. On the main menu, I have a sound clip that I want to play when the user first accesses the course. At the end of each lesson, the user is asked to return to the main menu. How can I set up a trigger so that the sound clip will not start over every time the user returns to the main menu? Also, the user does not have to complete the lesson to return to the main menu...they can return at any time. I just don't want the clip to play every time the user returns to the main menu.
Any help would be appreciated!