The Economist obituary this week is for Gustav Leonhardt. the great harpsichordist who is credited as the father of the early music movement.Last night I was a beneficiary of Leonhardt’s life work: I attended a stunning performance of The Enchanted Island at the Metropolitan Opera. This exuberant pastiche of great early opera, with harpsichords, countertenors and other sounds unheard in concert halls between the late 18th century and the late 20th century could never have happened without Leonhardt’s passionate advocacy for and mastery of the harpsichord and its repertoire.Thanks to Leonhardt and the many who joined him in this great work, the world has recovered the extraordinary sounds of early music as it was intended to be heard. Leonhardt never liked the 19th century with its lush sounds and, as he said of Beethoven’s Ode to Joy its ‘vulgar’ romanticism. My tastes are more catholic; I like it all.But Leonhardt’s ear for the ‘salt, not sugar’ of early music has greatly enriched us all. Anybody who sees The Enchanted Island will realize that Leonhardt was a musical Christopher Columbus, whose voyage of discovery opened up a whole world.