Many pianists would be happy to record either Bach's Goldberg Variations or Beethoven's Diabelli Variations. But Igor Levit has plunged in and recorded both, along with Frederic Rzewski's vast variation work from the 1970s, The People United Will Never Be Defeated.

Levit's three-disc set the BBC Music Magazine Recording of the Month for the January 2016 issue and you can hear clips from it in this podcast.

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