Regular world plays through to its natural end.
Invisible audio hotspots on each character's head (slightly larger), trigger each audio file to play for that character after 10(?) seconds.
Want to select option for audio file to be on same timeline, if possible, so audio doesn't always start over from the same point. If we can't sync to timeline, we can break audio into a few different chunks (4?), and have each hotspot disappear after x time, replaced by a new hotspot in the same place that will play the next audio file.