He was the high priest of 20th-century modernity, a founding father of electronic music, a pioneer of multi-faceted talent. Where others feared to tread Iannis Xenakis stepped, breaking the boundaries of sound, employing mathematical formulae – game theory included – to compose what had never been heard before. No musician – or architect, for he was that too – was as steeped in the classics nor as avant garde nor as quintessentially Greek. And yet it has taken more than 20 years since his death in Paris, the place to which he fled after narrowly surviving a British tank shell...