Thanks for helping me out.
I wanted to assign it to the masterslide because it seemed a more efficient way to do it. I have several slides eg quiz slides, where i would like the learner to be able to push a button to replay the same audio from that slide.
Currently i have done whate you have suggested, added audio to the slide and then assigned it to a button using adv action. But this is repetitive is it possible to just create an action which replays the slide audio which was just heard? I dont want to assign a specific audio file if i can help it.
No simple solution... I tried to explain to not use slide audio... but apparently you didn't understand me. You could try with micro-navigation, and re-enter the slide, but if the first slide audio is not finished, you'll end up with two simultaneous audio clips playing, not synced.
Since the audio clip is different on each slide, that would help because you could use a shared action, but still will have to define the unique parameter, which is the audio clip, for each slide.