Modern classical music is music written in the 20th century and beyond. Although much of it draws heavily on earlier forms, modern composers also experimented with rejection of long-held ideas; notably, Arnold Schoenberg questioned the traditional notions of harmony with his twelve-tone system[?], and John Cage questioned the very definition of music with his use of chance and found sounds.
... in central Sweden, in the county of Dalarna. The municipality covers an area of 1500.7 km². Of the total population of 26450, 13112 are male, and 13338 are female. The ...