The reason I asks was to determine if the sound in your story worked at all, or if the issue was only related to the Chrome web-browser.
As you could hear the sound from your story HTML file in another brand of web-browser then that generally means that the problem isn't in the HTML file itself. This probably means the problem has something to do with the Chrome web-browser itself.
Chrome has a setting which allows sound to be muted either for a particular web-page or for all web-pages.
Do you hear sound when you use Chrome to visit a different web-site (like YouTube or Spotify) on the internet? If so then the Chrome sound setting hasn't been turned of completely.
This article explains where to find Chrome's sound setting, in your case you need to make sure that the Allow sites to play sound (recommended) setting appears turned on.