From his Oscar winning score for The Lion King, through 12 Years A Slave to a series of superhero blockbusters, including the latest - Batman vs Superman - Hans Zimmer is, as one director put it, "quite simply the contemporary composer to work with". German born, British educated, he never received formal musical training and he's a champion of technology. Hardtalk's Shaun Ley asks Hans Zimmer whether the technology he so loves is killing the music makers?