Update! We have great news! Since early 2025, the Duolingo music course app has been updated to natively recognize MIDI input ! It successfully registers the keys you press (which is awesome!), even though it doesn't currently produce sound through your device's speakers. Everything we've previously published on this page is still totally valid, but now there's an even simpler, more direct way to get set up! You can use a specific sketch for your Arduino Leonardo to take the signals from your piano keyboard and convert them directly into MIDI signals. The Duolingo app understands this perfectly now! You can grab the file for this simplified approach right here on GitHub: [ Link to Arduino sketch ] Improving the Duolingo Music Course Experience: A Practical Approach After three months of studying music with Duolingo without prior knowledge, I've noticed that the course provides valuable skills, such as associating notes on the staff with their names, keyboard positi...