I have MACBook and until recently i had no problem, but since Adobe Flash Player update have NO SOUND ... as in the lesson starts but there is no sound... this problem is only on Duoligo web. Other webs work fine.
I get this message: It's possible that you have browser extensions that block Flash or that Flash crashed. Let's fix this! If you have a Flash blocker add 'duolingo.com' to its whitelist. If Flash crashed try reloading the page. Sound still not working? Go to the settings page in the top right corner to disable the speakers.
I have tried all of that, plus resetting safari, reinstalling flash player, rebooting the comp. Nothing works. Please help. I can't learn German if I can't pronounce the words....