In 1919, Rachmaninov's performance of his own devilish Prelude in C minor was punched into piano roll for posterity. Now you can see him play it. In 1919, legendary Russian composer, Sergei Rachmaninov, recorded his own performance of his Prelude in C minor onto piano roll, so it could be preserved as a recording. The Prelude in question is a very difficult piece, and Rachmaninov was able to play its hardest passages up to speed, and with exhilarating energy. And now – as well as hearing the performance through the historic piano roll, you can now see the performance (watch above).

Black midi music was unplayable. Watch human(ish) hands scale the piano keyboard with a mind-bending ferocity that would leave even Rachmaninov quaking in his boots. Somebody has asked artificial intelligence (AI) – in other words, a computer robot that learns – to play an'unplayable' piano piece. AI is meant to do impossible things. Like beat grandmasters at chess, and realise what we want to buy before we do.