Working with characters & avatars - adding audio

All triggers have a "When." For each trigger, the "When" needs to happen on the slide where that trigger is. So, for example, a trigger might run when the user clicks something. Or when the timeline starts or ends. Storyline provides lots of options: 

A trigger that plays or pauses audio needs to be on the slide where the audio is. 

Because you have two possible audios, you have to control when each one does or doesn't play. 

• Audio automatically starts playing when at its starting point on the timeline. 
• With two (or more) conflicting audios on the same timeline, you need triggers to pause all of them when the timeline starts. Those triggers would be followed by triggers to play a given audio based on a condition (e.g., the value of a variable). 
• Another option would be to put the audio files on separate layers. Then, when the base's timeline starts, show the appropriate layer based on a condition. 

There isn't a way to reset the timing of object appearances or animations to match which audio is playing. So you have two options:

• Ensure the audios are close enough that the same timeline events can be used, or
• Put everything—audio & objects—on separate layers so each timeline can be adjusted to match the audio. (That, of course, means you have separate layers to edit whenever changes are needed.)