Pause button doesn't function if there are slide layers??

All good examples.  My situation is slightly different.  The base layers on my slides do not hold the course content.  The layers do.  Each layer has its own audio.  I don't want to pause the base layer, I need users to be able to pause they layer they are viewing.  Do you think David's method would work in this situation?  Just add additional pause layers for each layer of the course?  I'd still love to explore and play with this idea as I think/wish the pause/play button should function no matter what layer is being viewed by the user.

In the meantime, in order to continue getting this course ready for my client, my work around is to remove the pause/play/scrubbar and change the properties of the previous button to a replay button.  Users won't be able to actually pause the course but they will have the option to replay the slide after it stops at the end of the timeline.  My client seems to be ok with this for now.