Give learners the option to turn on and off audio narration for entire course

Thanks for this.  The video was a very helpful guide.  I did have to configure the triggers a little differently being that I am using a newer version of Storyline.  With that being said, I have the button and the variable.  You click the button, and the audio no longer plays on every slide.  Task accomplished... almost.  The problem now is the presentation automatically advances to the next slide when the audio is done, even if it's not playing.  I have removed the trigger to "jump to the next slide when the timeline ends," but it is still advancing.  I ended up having to create another trigger that pauses the timeline if the audio variable is set to false.  I am a little surprised that I have to do this, as there is not trigger to advance to the next slide beyond clicking the 'next' button in player triggers.  Is this normal?