Wind instruments became more refined in the Classical period. While double reeded instruments like the oboe and bassoon became somewhat standardized in the Baroque, the clarinet family of single reeds was not widely used until Mozart expanded its role in orchestral, chamber, and concerto settings.
Romantic era music
The music of the Romantic era, from roughly the second decade of the 19th century to the early 20th century, was characterized by increased attention to an extended melodic line, as well as expressive and emotional elements, paralleling romanticism in other art forms. Musical forms began to break from the Classical era forms (even as those were being codified), with free-form pieces like nocturnes, fantasias, and preludes being written where accepted ideas about the exposition and development of themes were ignored or minimized.The music became more chromatic, dissonant, and tonally colorful, with tensions (with respect to accepted norms of the older forms) about key signatures increasing.The art song (or Lied) came to maturity in this era, as did the epic scales of grand opera, ultimately transcended by Richard Wagner's Ring cycle.
In the 19th century, musical institutions emerged from the control of wealthy patrons, as composers and musicians could construct lives independent of the nobility. Increasing interest in music by the growing middle classes throughout western Europe spurred the creation of organizations for the teaching, performance, and preservation of music. The piano, which achieved its modern construction in this era (in part due to industrial advances in metallurgy) became widely popular with the middle class, whose demands for the instrument spurred a large number of piano builders. Many symphony orchestras date their founding to this era. Some musicians and composers were the stars of the day; some, like Franz Liszt and Niccolò Paganini, fulfilled both roles.
The family of instruments used, especially in orchestras, grew. A wider array of percussion instruments began to appear. Brass instruments took on larger roles, as the introduction of rotary valves made it possible for them to play a wider range of notes. The size of the orchestra (typically around 40 in the Classical era) grew to be over 100.Gustav Mahler's 1906 Symphony no. 8, for example, has been performed with over 150 instrumentalists and choirs of over 400.
European cultural ideas and institutions began to follow colonial expansion into other parts of the world. There was also a rise, especially toward the end of the era, of nationalism in music (echoing, in some cases, political sentiments of the time), as composers such as Edvard Grieg, Nikolai Rimsky-Korsakov, and Antonín Dvořák echoed traditional music of their homelands in their compositions.
20th century, modern, and contemporary music
Main articles: 20th-century classical music, Contemporary classical music, and 21st-century classical music
See also: List of 20th-century classical composers by birth date and List of 21st-century classical composers
Modernism (1905–1985) marked a period when many composers rejected certain values of the common practice period, such as traditional tonality, melody, instrumentation, and structure. Composers, academics, and musicians developed extensions of music theory and technique. 20th century classical music, encompassing a wide variety of post-Romantic styles composed through the year 1999, includes late Romantic, Modern and Postmodern styles of composition. The term "contemporary music" is sometimes used to describe music composed in the late 20th century through to the present day
