Not a wonderful world: Louis Armstrong tapes reveal how racism scarred his life and career

He was a founding father of jazz, a trumpet virtuoso and a gravel-voiced singer revered across the world, with Mack the Knife and Hello, Dolly! among his enduring hits. Yet Louis Armstrong was so focused on how history would judge him that he sought to preserve his own story for posterity by taping his recollections, including about the prejudice he suffered over the colour of his skin.

Now the makers of a major documentary on the celebrated musician, nicknamed Satchmo or Pops, have