India, June 15 -- I'll admit it: I'm not typically drawn to the thunderous chaos of metal. This might seem odd coming from someone who has lived for nine years in Finland, a country that produces more metal bands per capita than almost anywhere else on earth. While my Nordic compatriots have given the world Nightwish, Children of Bodom and countless other such legends, the genre's reputation for unrelenting aggression has always felt more like an endurance test than musical enjoyment. So, some years ago, when a friend insisted I try a genre called blackgaze, I was sceptical. Then I heard Deafheaven's Sunbather (2013), and suddenly everything I thought I knew about heavy metal was turned upside-down. Deafheaven, a San Francisco band that eme...