Of all the enigmas that surround Erik Satie and his music, Vexations is probably the most enigmatic. A ‘theme’ in the bass, with two different harmonisations, to be played – according to an ambiguous note on the composer's autograph – 840 times. That is at least how it has been interpreted since the first public performance, which lasted more than 18 hours and was organized by the composer John Cage in 1963. When Satie wrote Vexations is uncertain, and although it is usually assumed to be intended for a keyboard instrument, that is also impossible to confirm. There are no known performances of it in the composer’s lifetime, and the single-page manuscript was only discovered after Satie’s death. The many question marks surrounding the work have made it a cult classic, and live performances – by a single pianist or several performers taking turns – are events that still attract attention, even if only a few in the audience sit out a complete performance.