Music fails to feature spontaneously played improvisational music.
Music ranges from strictly organized compositions -- such as Classical music symphonies from the 1700s and 1800s , through to spontaneously played improvisational music such as jazz , and avant-garde styles of chance-based contemporary music from the 20th and 21st centuries .	symphonies	symphony	jazz	jazz	Classical music	Classical music	improvisational music	Musical improvisation	avant-garde	avant-garde	chance-based	aleatory	contemporary music	contemporary music
