2Time Period 1900-present The modern forms of art music 20th Century Contemporary present21st Century 2000 – presentThe modern forms of art music
3Characteristics20th-century classical music developed or reacted to the trends started in the previous century. At the turn of the century, music was characteristically late Romantic in style, while at the same time the Impressionist movement, spearheaded by Claude Debussy, was being developed in France. America also began developing its own vernacular style of classical music, notably in the works of Charles Ives, John Alden Carpenter, and (later) George Gershwin, while in Vienna, Arnold Schoenberg conceived atonality and later developed the twelve-tone technique.Classical music in the 20th century varied greatly.
4Perhaps the most important feature during this time period of classical music was the increased use of dissonance. Because of this, the 20th century is sometimes called the "Dissonant Period" of classical music, following the common practice period, which emphasized consonance pushing more boundaries