Audio playback isn't working.
I cannot hear any sound when I click the speaker icons. (Sound does work on youtube with both webm and flash playback.)
I run Trisquel 5.5, which is an Ubuntu 11.10 clone. I have gnash installed, which is a flash replacement. My browser is based on firefox 14.
I love the website; would you please consider fixing this problem? It seems like people with other operating systems are having the same problem too!
Thanks very much. :)
I used to have the same problem in Chrome and got idea how to work it out from this thread. So I'm posting it here and probably this will work for you as well. My browser is set up not to run plugins (including Flash) automatically, so that I have to click every time I want to watch a video, e.g. on YouTube. This apparently was the cause of the problem. I've added an exception for duolingo.com website: Settings->Show Advanced Settings->Content Settings->Plug-ins->Manage Exceptions; add "[*.]duolingo.com" and restart Chrome. Voilà!
After I got back from my holiday (about a week), sound no longer works on any of my Linux computers. When I log into Windows to try it, Firefox tells me Duolingo relies on Flash. Well, I don't use Flash - it is a dated technology which fails on many computers and is being phased out. Duolingo should move past Flash. But that doesn't explain why Duolingo sound work before I went on holidays and now does not (on two different computers).
Just in case anyone else encounters this problem: the Firefox plugin 'HTTPS everywhere' actually blocks Duolingo from loading now. Some website change they made to Duolingo in the past 2 weeks has caused this, as the plugin worked fine with Duolingo before this.
Sound also works now, so I'm not sure if Duolingo fixed something that was broken, or again the above plugin was interacting badly with the website update.
Regardless of whether it was Flash causing the problem or not, my point stands: it is not a sound business decision to base your website off Adobe's proprietary, buggy, and insecure Flash. To make matters worse, each year I hear of a new device or platform which has dropped Flash support.
Just a data point here, as it is not meant to be a solution for OP (tho it might work if you're willing to use binary-only plugins): installing Adobe-supplied Flash plugin (11.2) got audio playback working for me (ubuntu 12.04, chromium 18).
This is not a good situation long-term, as Adobe is dropping support of Linux as of the current release (they will, however, backport fixes to 11.2 for some time).
I'm just hoping the Duolingo team has an alternative plan in the works that does not require Flash for site functionality.
Since I updated my Mac OS to Mojave, the speakers wouldn't work with Duolingo. Makes some of the exercises impossible! Eventually, I found the problem was all to do with Flash. So, here is how to cure it. Click on the Apple symbol, and select System Preferences. The Flash Player symbol should be down at the bottom left. Click on it. One of the headings there should be 'Camera and Microphone settings'. Underneath it is a box 'Camera and Microphone settings by site". Click on it, and you will find a list of sites allowed by Flash. Mine was empty. Click the '+' symbol at the bottom left, and then enter the name of the site, i.e. www.duolingo.com Works a treat now!