Anyone can write their own music with these apps

The Korg iMS-20 iPad app simulates the classic analogue synthesizer Korg MS-20.

The app stores are full of apps for musicians and music enthusiasts, offering to help tune a guitar, produce sound like a synthesiser or even teach you how to play the piano. Whether they can actually replace a flesh-and-blood teacher or a real studio is another question. 

Currently, there are over 50,000 music apps in the music and audio category in the Apple and Google app stores. "Most of these apps are suitable for playing music recordings," says Matthias Krebs from the app music research centre at the University of the Arts in Berlin.