What does 'Can't listen now' do?
I turned it on by accident a few days ago, and now the regular conversational voice in lessons plays back, but I get nothing from the turtle button.How do I turn it off?
"Can't listen now" turns off listening exercises - you might want this for example if you're on a bus and have forgotten your headphones, and Duo will only give you reading and writing questions for about an hour, then it goes back to normal.
The turtle button is a separate problem - I've heard a few users complain recently that there's a problem with it. Hopefully they will fix it soon.