Mycielski met Szymanowski in the autumn of 1926, after one of his concerts in Kraków. In January 1928 he went to consult him in Warsaw. Szymanowski advised him to go to Paris to study composition. In 1929 the two men became friends. Mycielski saw Szymanowski in Paris, Davos and Warsaw, and visited him in Zakopane. He would show the master his compositions, listening to his advice. In addition, he witnessed the emergence of Szymanowski’s new pieces. In 1936 he was involved in the preparations of the staging of Szymanowski’s Harnasie at the Paris Opera. After the master’s death Mycielski accompanied the funeral procession from the Polish border to Kraków, where Szymanowski was laid to rest at Skałka. In addition, he dedicated his 1937 composition Lamento di Tristano (completed ten years later) in memory of Karol Szymanowski. Mycielski also devoted to Szymanowski many of his journalistic pieces, written throughout his life.