Virtual tour (360 degree tour) automatic audio play possible?

Aloha--

Originally created a 360° virtual tour several months ago, I added an audio track and later deleted it because it played constantly and was annoying. I'm now creating a second tour for which an automatic audio track would be appropriate, but I can't seem to find that function anymore. I don't see any option to permit auto play, and so the only way it works is if the viewer clicks on the speaker icon. Was there a change made? Is there a way to allow audio for a specific scene to auto play? I can't find any documentation on this.