Sound in Linux
I am unable to hear sound in linux. I am using Gentoo, Firefox, KDE? Sound is normal for any other programs that I am using.
I have solved the problem of hearing the sound samples. I use Flashblock to eliminate videos and annoying ads that start immediately upon entering a site. While it was not obvious to me that flash is used here, when I experimentally whitelisted duolingo.com and refreshed, I was able to hear the sound samples.
I had also tried eliminating pulseaudio (for essentially no good reason). I will try putting it back to see if it makes any difference whatsoever. I suspect not.
So, now I can settle in to mispronouncing Spanish...
Finally fixed this on my Fedora 23 Firefox. Goto about:config and search for media.gstreamer.enabled -- set it to true and it should work. I did some steps before this though, installing rpmfusion to get the mp3 codecs https://ask.fedoraproject.org/en/question/42073/how-i-can-install-audio-codecs-like-mp3/
After installing the rpmfusion, my software auto-updater had 2 or 3 audio downloads that started prompting me to download. I updated those as well. Then the gstreamer.enabled worked.
Wikipedia has sound samples which the latest versions of Firefox can play without Flash. See if they are working http://en.wikipedia.org/wiki/File:German_alphabet-2.ogg
Thanks for responding. neilforshaw: The wikipedia sound samples worked just fine.
avikar: Yes, ALSA is installed. Yes, sound works in Firefox. Basically, I'm using sound with VLC, firefox, flash, or mplayer with no problems. I just verified that all devices are on within alsamixer.
Also, when I hit the sound button next to the words, you can see the little swirling symbol next to duolingo in the upper left corner. That suggests to me that the button is functioning, the audio is being downloaded. It just isn't being played.
It would be nice if there was a way to generate error messages.
Anyway, thanks for your help.
I'm using 32 bit Mint 13 with Firefox and flashblock. I tried the above suggestion about the whitelist, but it didn't help. So will go back to what I have been doing: Use a different browser for duolingo. Midori web browser plays the sounds perfectly. Can't get the microphone to work though but that is probably something to do with my settings.
I'm on Fedora 23. When trying to play a duolingo sound sample, I got a prompt to install a MPEG-1 Layer 3 (MP3) decoder. However, the software manager that opened directed me to a fedora page saying that it's not available. Just posting this in case the Duolingo devs are reading https://fedoraproject.org/wiki/PackageKit_Items_Not_Found#Missing_Codec