working with audio tracks on slide layers
I'm a beginner storyline user.
I have a main menu page (with several buttons linking to other slides) that will be revisited several times throughout the course. I would like a longer audio track to play on first visit and then a shorter audio track to play on subsequent visits to the main menu. I imagine there are different ways to do this, I tried the following which did not work.
The base layer has the longer audio track on it. I created a layer (more or less identical to base) with the shorter audio track. In slide properties for the layer, I clicked 'pause timeline of base layer' and 'resume saved state when revisiting'. I then set another trigger 'show layer' (with short audio) when the state of any of the buttons has been visited. My idea here is that none of the buttons will have been clicked on first visit and at least one will have been clicked on revisit. The layer is not appearing on revisit, it's the base layer each time.
In another attempt, I created a variable with default value of false and then trigger to change that variable to true when the timeline starts on the base layer. Then created a trigger, show layer (with short audio) when variable changes. That didn't seem to work either.
I have not previously used any trigger with play, pause or stop media- maybe this is the direction I need to go? I guess I could 'stop media' when user clicks one of the buttons?
Can someone recommend a solution? Please and thanks!