In autumn 2024, the Morgan Library in New York announced a sensation: in a legacy, curator Robinson McClellan had discovered a postcard-sized manuscript of a waltz in a minor with the inscription “Chopin”. Chopin experts all over the world have meanwhile scrutinized and confirmed the authenticity of the manuscript: undoubtedly an autograph by the Polish composer, it is moreover the short waltz of a hitherto unknown original work. Scholars and pianists have since then fallen into a waltz fever! ...