If you’re on a Mac with the Safari browser, some activities don’t automatically play sound at the beginning. You can fix this with a setting in your Safari Preferences that allows Starfall sounds to Auto-Play.
Set Preferences to allow Starfall sounds to Auto-Play:
Open www.starfall.com in your browser window.
In the upper left of your browser menu bar, select: Safari > Preferences. Then click the Websites button in the top bar.
Select the Auto-Play option from the menu on the left side to open the list of websites to review.
Find “starfall.com” (there may be a long list) and set the option to “Allow All Auto-Play.”
Close your Preferences.