How to prevent audio from playing when returning to slide

Hello,  I have just recently started working in Articulate. Because of the security situation here I can only use Articulate 3.  I have a module where the user will click a link to be taken to a certain section similar to Jill's original question. After the user works through that section they will have to click back to the main page to click another link to proceed to the next section.  When the user clicks back after viewing the section the audio on the main page continues to play.  Is there a way to stop the audio when the user clicks away from the main page instead of when the audio completes? It seems like that you can get through the slides in the section quicker than the length of the audio on the main page.  Unfortunately I can't send a copy of my work due to security issues. Any help would be appreciated.