Joining the likes of Spotify, Pandora and Beats Music, YouTube has launched a subscription service that lets people stream ad-free music videos and download them for offline use. The $10 monthly fee for Music Key also provides access to Google's Play All Access.

Young people have always looked to music, filtered through radio DJs, for identity. For generations growing up with every song at their fingertips and algorithms replacing DJs, how is the medium being redefined, and what new roles can it fulfil?

Neil Young's new HD music player, PonoPlayer, surpassed its Kickstarter goal of $800,000 just hours after launching. But can people really tell the difference in sound quality, or is it purely psychological? And how will its Toblerone shape fit in our flexible, sleek world?