That creative journey encompasses some of the richest music of the 20th century, and reveals an imaginative world of dizzying variety and expressive power. It's no surprise that of the entire post-war generation who were at the forefront of the avant garde in the 1950s and 60s, it's Ligeti who is played the most. And here are just three reasons why: listen to the Kyrie of the Requiem for one of the darkest visions of musical terror ever imagined, then revel in the rhythmic glitter and complexity of a piece like the first Piano Etude, and relish the warped harmonic world of the Horn Trio, like looking at Brahms or Schumann through a distorting mirror.