It is often assumed that composers who create outstanding works for a particular instrument are also accomplished players of that instrument. However, this is not the case with Carl Nielsen. Newly discovered archival materials from the State Library in Aarhus, including wax cylinders containing his own performances, suggest that Nielsen's piano playing was of varying quality. His daughter, Anne-Marie Telmányi, recounted an incident during a stay in Paris in 1926: After a Maurice Ravel concert, Nielsen surprisingly played a Mozart fantasia and refrained from performing any of his own works.
Despite his insecurities as a pianist, his ability to compose piano music remained unaffected. On the contrary, the very lack of his own playing practice seemed to open up new freedoms for his imagination in composition. His works for piano are characterized by a distinctive musical language and a childlike curiosity for experimentation and invention, influenced by his early experiences with the instrument. Furthermore, Nielsen's piano music reveals a tension: On the one hand, it emphasizes tactile exploration and immediate expression at the piano, on the other hand, it impresses with imagination and adventurous musical ideas that lead to new sound characteristics and forms of expression.