Agnes Obel: 'It's called a Trautonium – and it can electrocute people!'

Denmark’s Agnes Obel takes music where it has never gone before, layering 250 tracks on top of each other, and duetting with a male cyborg version of herself. Where does it all come from?It’s mid-afternoon and a surprise heatwave is weighing heavily in the Victorian corridors and stairwells of Hoxton Hall. Heading to a cool room in the attic of the London venue is the woman playing her new record here tonight: a pale-eyed Dane who’s already had two platinum-selling albums acros