Language learning app Duolingo, with more than 500 million users, is working on a music learning service, reports TechCrunch.

The Pittsburgh-based tech company currently has a small team working on a music product and is looking for a music teacher who has theoretical knowledge and practical teaching experience.

The company also posted announcement for a freelance music composition and curricular consultant position, but is no longer accepting applications for this position.

The job description states that the new app will teach basic concepts of music theory using popular songs and teachers.

Duolingo has gradually moved beyond language learning and launched several spin-off projects that could bring significant profits in the coming years. For example, The Duolingo English Test, which emerged as a result of a hackathon in 2014, is an online language test. During the pandemic, the company also launched Duolingo ABC, a free application aimed at learning English for children aged 3 to 6.

500 million people currently use the Duolingo language learning app. According to its latest quarterly reports, the company managed to double its paid user base last year. Its total revenue in 2022 also nearly doubled to $369.5 million.