Android app VS. web problem
I think I found a little bug: If I turn off sounds on web and then I use the android app I can not turn on the sound (on the mobile app). So I do not get dictation exercise(on mobile app) until I go to Duolingo on web and turn the sound on.
Sometimes I use duolingo-website at work and I turn off every sound. Then I forget to turn on. :) While I go home by bus I use Duo-android with earphone. But I never get dictation, I can not turn on in the app.