Add multiple time triggers to an artboard.
For example one time trigger would play a sound after 0.6 seconds, and another time trigger would move to the next artboard after 2 seconds.
Chris Canfield commented
This is a simple one that is almost required for anything with sound. "Play this sound and do this animation" is almost essential in everything I do. Sometimes that can be tied to a tap trigger. But a lot of the time it's in the middle of an animation sequence, and you just need to play a piece of audio to understand the experience.
That it's so hard to prototype with audio is a real shame, and a lot of that comes down to simple things like not being able to add an audio action at the same time as an auto-animate action.