You can explore this gallery live here.
Your gallery.json file will necessarily be different from the one in this repository. What you need to do to enable the anaverse to discover the audioguide is add a field as follows:
"audioguide": { "mainTrack": "audioguide.mp3" },Please use either audioguides you recorded yourself, or soundtracks you have a right to use. You can also use generative music from this notebook using a browser sound recording extension.