From later this year, its app will feature a new music education course, comprising "hundreds of interactive lessons all in a digital piano experience, with over 200 familiar tunes to learn." It's part of an expansion of the main Duolingo app that also includes maths which previously sat within a separate app. The music course will launch on 11th October during the company's 'Duocon' event, initially in English and Spanish within the iOS version. Pretty fascinating sidestep – if you try it out, let us know how you get on!