The allure of Carlo Gesualdo, eighth Count of Conza and third Prince of Venosa, has been felt by music-lovers from the humblest madrigal singer to the likes of Stravinsky, Boulez and Werner Herzog. Now, just three years after celebrating the 400th anniversary of his death in 1613, his birth in 1566 gives us a second chance to remind ourselves of that heady mix of murder and chromaticism that so famously characterises his life and work.