Spotify has collaborated with classical composer Ludovico Einaudi, allowing users to play new track Night on its homepage. 

The partnership is said to mark the first time Spotify has made it possible for users to perform music within the app, not just stream it.

The Touch Pianist app turns a computer keyboard into a piano and is available today in the UK - with more countries lined up for later this year. Although it is available on the Spotify homepage, only paying ...