If you use Duolingo on a chromebook, you may have microphone problems. I tinkered around with the settings and chromebooks do not allow websites to access your microphone and camera by default. Change that by going into settings and Privacy.
Now for the surprise. This didn’t completely fix my problem. I did a little more searching and found that Alsamixer is the key. Press crtl+alt+t to pop open a new crosh tab. Type shell and enter.
Bamb! Alsamixer almost like linux. That shouldn’t be a surprise. One issue I did encounter was the function keys wouldn’t work even when I used the function key. Not all is lost. For some reason the search key needs to be pressed to invoke the function keys.
No problem. Press it with your desired function key. Escape to exit.
I like Duoling to keep up on my Spanish, but it occurs to me that it is also useful for my horrible Italian. Duolingo lets you select multiple languages at the same time. I have no idea if there is a limit to the number, but I thought that I would stick to the two I know pretty well. New chromebooks are much better than the one I have. I'm going to start shopping for a new one soon.