Ther's a lot of discussion about Duolingo speech recognition on this forum and on the internet, but I can't find a microphone facility on my account. My settings only show "speaker" and "sound effects" buttons - nothing else. I've checked on 3 computers with differing hardware and the option just isn't there. Has this feature been discontinued?
The option is also gone from my web interface but if you can find an iPhone or iPad with the app on, you can turn the Speaking exercises on/off.