Appalachian Spring is an American ballet created by the choreographer Martha Graham and the composer Aaron Copland, later arranged as an orchestral work. Commissioned by Elizabeth Sprague Coolidge, Copland composed the ballet music for Graham; the original choreography was by Graham, with costumes by Edythe Gilfond and sets by Isamu Noguchi. The ballet was well received at the 1944 premiere, earning Copland the Pulitzer Prize for Music during its 1945 United States tour. The orchestral suite composed in 1945 was played that year by many symphony orchestras; the suite is among Copland's best-known works, and the ballet remains essential in the Martha Graham Dance Company repertoire. Graham was known for creating the "Graham technique" of dance; in the 1930s, she began commissioning scores from various composers, often related to American history and culture. Around the same time, Copland incorporated relatable and accessible musical characteristics of the Americana style to increase his music's appeal to the general public; he first implemented this in earlier ballets like Billy the Kid and Rodeo. The initial scenario for Appalachian Spring devised by Graham was revised many times by both her and Copland; the title characters' names were changed numerous times and other characters from the early revisions were cut in the final production. Originally orchestrated for a thirteen-piece chamber orchestra, the score was arranged into various suites by Copland for different purposes; the original ballet featured eight episodes, three of which were cut in the well-known orchestral suite. The ballet takes place in a small Appalachian settlement in 19th-century Pennsylvania. There are four main characters: the Bride, the Husbandman, the Pioneer Woman, and the Revivalist; the last is accompanied by four Followers. Appalachian Spring follows the Bride and the Husbandman as they get married and celebrate with the community. Themes of war are present throughout the story; it is suggested that the Husbandman leaves for war, causing worry and anxiety among the community. Shaker themes also influenced the ballet, notably in the music, where Copland incorporated a theme and variations on the common Shaker tune "Simple Gifts".

Billy the Kid is a 1938 ballet written by the American composer Aaron Copland on commission from Lincoln Kirstein. It was choreographed by Eugene Loring for Ballet Caravan. Along with Rodeo and Appalachian Spring, it is one of Copland's most popular and widely performed pieces. It is most famous for its incorporation of several cowboy tunes and American folk songs and, although built around the figure and the exploits of Billy the Kid, is not so much a biography of a notorious but peculiarly appealing desperado as it is a perception of the "Wild West", in which a figure such as Billy played a vivid role. It premiered on 16 October 1938 in Chicago by the Ballet Caravan Company, with pianists Arthur Gold and Walter Hendl performing a two-piano version of the score. The first performance in New York City occurred on 24 May 1939, with an orchestra conducted by Fritz Kitzinger.

Dance Panels is a ballet composed by Aaron Copland in 1959 for a planned collaboration with choreographer Jerome Robbins. After Copland had written the score, Robbins reneged on his commitment and the performance did not take place. Three years later, Copland revised the score for a ballet by the Bavarian State Opera in Munich, Germany, where it premiered on 3 December 1963. The ballet was performed by the New York City Ballet in 1965 and the concert version received its first performance at the Ojai Music Festival the following year. According to Copland biographer Howard Pollack, Dance Panels has proven from a musical standpoint one of the composer's more accessible late scores. While some of its more dissonant moments sound similar to Copland's twelve-tone compositions, other parts recall his earlier stage and screen music. It is also the only one of Copland's six ballets not written to a specific program.

This article lists compositions written for piano duo. The list includes works for piano four-hands and works for two pianos. Catalogue number and date of composition are also included. Ordering is by composer surname. A list of notable performers who played and recorded these works is at List of classical piano duos (performers).

Of Mice and Men is a 1939 American drama film based on the 1937 play of the same name, which itself was based on the novella of the same name by author John Steinbeck. The film stars Burgess Meredith, Betty Field, and Lon Chaney Jr., and features Charles Bickford, Roman Bohnen, Bob Steele, and Noah Beery Jr. The film tells the story of two men, George and his intellectually disabled partner Lennie, trying to survive during the dustbowl of the 1930s and pursuing a dream of owning their own ranch instead of always working for others. Starring in the lead roles were relative Hollywood newcomer Burgess Meredith as George and veteran actor Lon Chaney Jr. (the son of famed silent film actor Lon Chaney) as Lennie. Chaney had appeared in more than 50 films by that point in his career, but Of Mice and Men was his first major role. Betty Field's role as Mae was her breakthrough role in film. The film, produced by the Hal Roach Studios and distributed by United Artists, was adapted by Eugene Solow and directed by Lewis Milestone. The film was an critical and commercial success and was nominated for four Academy Awards, including Best Picture (Outstanding Production). The musical score was by American composer Aaron Copland. Released on December 30, 1939, it appeared in the 1980s and 1990s in revival theater houses, video and cable, and it earned a following of fans (both audience members and film critics) who praised the movie for its interpretation of the Steinbeck novella.

Our Town is a 1940 American drama romance film adaptation of the 1938 play of the same name by Thornton Wilder, starring Martha Scott as Emily Webb, and William Holden as George Gibbs. The cast also included Fay Bainter, Beulah Bondi, Thomas Mitchell, Guy Kibbee, and Frank Craven. It was adapted by Harry Chandlee, Craven, and Wilder, and directed by Sam Wood. The film was a faithful reproduction of the play except for two significant changes: the film used scenery, whereas the play had not; the events of the third act, which in the play revolve around the death of one of the main characters, were turned into a dream from which she awakens, allowing her to resume a normal life. Producer Sol Lesser worked with Wilder in creating these changes. Wilder wrote Lesser that "Emily should live.... In a movie you see the people so close to that a distant relation is established. In the theater they are halfway abstractions in an allegory; in the movie they are very concrete.... [I]t’s even disproportionately cruel that she die. Let her live...." A radio adaptation of the film on Lux Radio Theater on May 6, 1940, used the altered film ending. The U.S. copyright of the film was not renewed after its first term expired in 1968.

Rodeo is a ballet composed by Aaron Copland and choreographed by Agnes de Mille, which premiered in 1942. Subtitled "The Courting at Burnt Ranch", the ballet consists of five sections: "Buckaroo Holiday", "Corral Nocturne", "Ranch House Party", "Saturday Night Waltz", and "Hoe-Down". The symphonic version omits "Ranch House Party", leaving the other sections relatively intact.

Aaron Copland ( KOHP-lənd; November 14, 1900 – December 2, 1990) was an American composer, critic, writer, teacher, pianist, and conductor of his own and other American music. Copland was referred to by his peers and critics as the "Dean of American Music". The open, slowly changing harmonies in much of his music are typical of what many consider the sound of American music, evoking the vast American landscape and pioneer spirit. He is best known for the works he wrote in the 1930s and 1940s in a deliberately accessible style often referred to as "populist" and which he called his "vernacular" style. Works in this vein include the ballets Appalachian Spring, Billy the Kid and Rodeo, his Fanfare for the Common Man and Third Symphony. In addition to his ballets and orchestral works, he produced music in many other genres, including chamber music, vocal works, opera, and film scores. After some initial studies with composer Rubin Goldmark, Copland traveled to Paris, where he first studied with Isidor Philipp and Paul Vidal, then with noted pedagogue Nadia Boulanger. He studied three years with Boulanger, whose eclectic approach to music inspired his own broad taste. Determined upon his return to the U.S. to make his way as a full-time composer, Copland gave lecture-recitals, wrote works on commission and did some teaching and writing. But he found that composing orchestral music in a modernist style, which he had adopted while studying abroad, was unprofitable, particularly in light of the Great Depression. He shifted in the mid-1930s to a more accessible musical style that mirrored the German idea of Gebrauchsmusik ("music for use"), music that could serve utilitarian and artistic purposes. During the Depression years, he traveled extensively to Europe, Africa, and Mexico, formed an important friendship with Mexican composer Carlos Chávez, and began composing his signature works. During the late 1940s, Copland became aware that Stravinsky and other fellow composers had begun to study Arnold Schoenberg's use of twelve-tone (serial) techniques. After he had been exposed to the works of French composer Pierre Boulez, he incorporated serial techniques into his Piano Quartet (1950), Piano Fantasy (1957), Connotations for orchestra (1961), and Inscape for orchestra (1967). Unlike Schoenberg, Copland used his tone rows in much the same fashion as his tonal material—as sources for melodies and harmonies, rather than as complete statements in their own right, except for crucial events from a structural point of view. From the 1960s onward, Copland's activities turned more from composing to conducting. He became a frequent guest conductor of orchestras in the U.S. and the UK and made a series of recordings of his music, primarily for Columbia Records.

This is a list of notable events in music that took place in the year 1945.

The Heiress is a 1949 American romantic drama film directed and produced by William Wyler, from a screenplay written by Ruth and Augustus Goetz, adapted from their 1947 stage play of the same title, which was itself adapted from Henry James' 1880 novel Washington Square. The film stars Olivia de Havilland as Catherine Sloper, a naive young woman who falls in love with a handsome young man despite the objections of her emotionally abusive father who suspects the man of being a fortune hunter. Montgomery Clift stars as Morris Townsend, and Ralph Richardson as Dr. Sloper. The Heiress premiered in Los Angeles on October 6, 1949, and was theatrically released by Paramount Pictures on December 28, 1949. Although a box office failure, grossing $2.3 million on a $2.6 million budget, the film garnered critical acclaim, with reviewers praising Wyler's direction, its screenplay and the performances of the cast. The film received a leading eight nominations at the 22nd Academy Awards, including for the Best Picture, and won four awards (more than any other film nominated that year): Best Actress (for de Havilland), Best Original Score, composed by Aaron Copland, Best Production Design, and Best Costume Design. In 1996, The Heiress was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant". Universal Pictures, through its EMKA division, currently handles distribution of the film.

The Tender Land is an opera with music by Aaron Copland and libretto by Horace Everett, a pseudonym used by Erik Johns, a dancer and Copland's former lover.