Set a global variable, say _audioOn, and initialize it to 1. then set the conditional in each audio object to
Variable: _audioOn
Relationship: equal to
Value: 1
On the button that turns the audio off:
On: mouse click
Action: modifiy variable
Target: _audioOn
Value: 0
Mod type: set variable contents
When you get to the next page, the audio will not play as _audioOn is now 0.Just reset the Value of the action to "1" to turn it back on for the course.
Do you have audio buttons to control the on/off on each page as well?
HTH
Dwayne