Igor Stravinsky in the context of "Nikolai Rimsky-Korsakov"

The twelve-tone technique—also known as dodecaphony, twelve-tone serialism, and (in British usage) twelve-note composition—is a method of musical composition. The technique is a means of ensuring that all 12 notes of the chromatic scale are sounded equally often in a piece of music while preventing the emphasis of any one note through the use of tone rows, orderings of the 12 pitch classes. All 12 notes are thus given more or less equal importance, and the music avoids being in a key.

The technique was first devised by Austrian composer Josef Matthias Hauer, who published his "law of the twelve tones" in 1919. In 1923, Arnold Schoenberg (1874–1951) developed his own, better-known version of 12-tone technique, which became associated with the "Second Viennese School" composers, who were the primary users of the technique in the first decades of its existence. Over time, the technique increased greatly in popularity and eventually became widely influential on mid-20th-century composers. Many important composers who had originally not subscribed to or actively opposed the technique, such as Aaron Copland and Igor Stravinsky, eventually adopted it in their music.

In music, modernism is an aesthetic stance underlying the period of change and development in musical language that occurred around the turn of the 20th century, a period of diverse reactions in challenging and reinterpreting older categories of music, innovations that led to new ways of organizing and approaching aspects of music such as harmony, melody, sound, and rhythm, and changes in aesthetic worldviews in close relation to the larger identifiable period of modernism in the arts of the time. The operative word most associated with it is "innovation". Its leading feature is a "linguistic plurality", which is to say that no one musical language, or modernist style, ever assumed a dominant position.

Examples include the celebration of Arnold Schoenberg's rejection of tonality in chromatic post-tonal and twelve-tone works and Igor Stravinsky's move away from symmetrical rhythm.

Ragtime, also spelled rag-time or rag time, is a musical style that was popular and heavily influenced musical genres such as the Blues, and was seen in the United States from the 1890s to 1910s. Its signature trait is its syncopated or "ragged" rhythm. Ragtime was popularized during the early 20th century by composers such as Scott Joplin, James Scott, and Joseph Lamb. Ragtime pieces (often called "rags") are typically composed for and performed on the piano, though the genre has been adapted for a variety of instruments and styles.

Ragtime music originated within African American communities in the late 19th century and became a distinctly American form of popular music. It is closely related to marches. Ragtime pieces usually contain several distinct themes, often arranged in patterns of repeats and reprises. Scott Joplin, known as the "King of Ragtime", gained fame through compositions like "Maple Leaf Rag" and "The Entertainer". Ragtime influenced early jazz, Harlem stride piano, Piedmont blues, and early 20th century European classical composers such as Erik Satie, Claude Debussy, and Igor Stravinsky. Despite being overshadowed by jazz in the 1920s, ragtime has experienced several revivals, notably in the 1950s and 1970s (the latter renaissance due in large part to the use of "The Entertainer" in the film The Sting). The music was distributed primarily through sheet music and piano rolls, with some compositions adapted for other instruments and ensembles.

The Ballets Russes (French: [balɛ ʁys]) was an itinerant ballet company begun in Paris that performed between 1909 and 1929 throughout Europe and on tours to North and South America. The company never performed in Russia, where the Revolution disrupted society. After its initial Paris season, the company had no formal ties there.

Originally conceived by impresario Sergei Diaghilev, the Ballets Russes is widely regarded as the most influential ballet company of the 20th century, in part because it promoted ground-breaking artistic collaborations among young choreographers, composers, designers, and dancers, all at the forefront of their several fields. Diaghilev commissioned works from composers such as Igor Stravinsky, Claude Debussy, Sergei Prokofiev, Erik Satie, and Maurice Ravel, artists such as Vasily Kandinsky, Alexandre Benois, Konstantin Korovin, Nicholas Roerich, Pablo Picasso, and Henri Matisse, and costume designers Léon Bakst, Ivan Bilibin and Coco Chanel.

A set (pitch set, pitch-class set, set class, set form, set genus, pitch collection) in music theory, as in mathematics and general parlance, is a collection of objects. In musical contexts the term is traditionally applied most often to collections of pitches or pitch-classes, but theorists have extended its use to other types of musical entities, so that one may speak of sets of durations or timbres, for example.

A set by itself does not necessarily possess any additional structure, such as an ordering or permutation. Nevertheless, it is often musically important to consider sets that are equipped with an order relation (called segments); in such contexts, bare sets are often referred to as "unordered", for the sake of emphasis.

A choral symphony is a musical composition for orchestra, choir, and sometimes solo vocalists that, in its internal workings and overall musical architecture, adheres broadly to symphonic musical form. The term "choral symphony" in this context was coined by Hector Berlioz when he described his Roméo et Juliette as such in his five-paragraph introduction to that work. The direct antecedent for the choral symphony is Ludwig van Beethoven's Ninth Symphony. Beethoven's Ninth incorporates part of the ode An die Freude ("Ode to Joy"), a poem by Friedrich Schiller, with text sung by soloists and chorus in the last movement. It is the first example of a major composer's use of the human voice on the same level as instruments in a symphony.

A few 19th-century composers, notably Felix Mendelssohn and Franz Liszt, followed Beethoven in producing choral symphonic works. Notable works in the genre were produced in the 20th century by Gustav Mahler, Igor Stravinsky, Ralph Vaughan Williams, Benjamin Britten and Dmitri Shostakovich, among others. The final years of the 20th century and the opening of the 21st century have seen several new works in this genre, among them compositions by Mikis Theodorakis, Peter Maxwell Davies, Tan Dun, Philip Glass, Hans Werner Henze, Krzysztof Penderecki, William Bolcom and Robert Strassburg.

A jazz scale is any musical scale used in jazz. Many "jazz scales" are common scales drawn from Western European classical music, including the diatonic, whole-tone, octatonic (or diminished), and the modes of the ascending melodic minor. All of these scales were commonly used by late nineteenth and early twentieth-century composers such as Rimsky-Korsakov, Debussy, Ravel and Stravinsky, often in ways that directly anticipate jazz practice. Some jazz scales, such as the eight-note bebop scales, add additional chromatic passing tones to the familiar seven-note diatonic scales.

Wolfgang Reitherman (June 26, 1909 – May 22, 1985), also known and sometimes credited as Woolie Reitherman, was a German-American animator, director and producer. As a member of the "Nine Old Men" at Walt Disney Productions, Reitherman was known for his action-oriented animation.

Born in Munich, Reitherman relocated to the United States with his family. He attended Pasadena Junior College and briefly worked as a draftsman for Douglas Aircraft Company. Desiring a career in visual arts, Reitherman studied at the Chouinard Art Institute. On the advice of an art instructor, Reitherman applied as an animator for Walt Disney Productions. Reitherman animated on several Silly Symphonies cartoon shorts. He next animated the Slave in the Magic Mirror in Snow White and the Seven Dwarfs (1937), Monstro in Pinocchio (1940), and the climactic dinosaur fight in Igor Stravinsky's "Rite of Spring" segment of Fantasia (1940).