If this is slide audio, and you use the On Enter event to Pause the slide, the slide audio will not play. I'm just busy writing out a 4th blog post about the Timeline, explaining difference between the Pause command and the Pausing point, and effect on audio etc. If the slide audio had started and you pause a little bit later, slide audio can play.
Here is one trick, which I use if you can replace the Slide audio by Play Audio command. Replace the simple Pause command by a standard action with two commands:
Play audio ....
Pause
Audio clips that are started by Play audio, will never be paused by the Pause command, when they have started playing. This tip and many more will be found in that article soon to be published. The link to the second is in top of this forum. Here are the links to the 3 on my blog:
Captivate's Timeline(s) Demystified - Intro - Captivate blog
Video Demo Timeline demystified (cpvc-project) - Captivate blog
Captivate's Timelines (master slide/normal slide cptx) demystified - Captivate blog