Duolingo might be expanding into music soon. A job posting by the company shows it has a small team working on building an app for teaching music. The job ad is looking for an "expert in music education who combines both theoretical knowledge of relevant learning science research and hands-on teaching experience."
Whoever gets the job will ensure the app is "well-grounded in learning science." They need to translate "research findings into concrete ideas" that can be used for "learning by doing" activities the company is known for. The one who takes the position will also need to take the lead on curriculum development, suggesting the app is in its early stages.