French specific music, German electronic music, Japanese electronic music, American electronic music, random music.
DJ dance music is electronic music.
1. French Specific Music
Shortly before this, composers in Paris had also begun to utilize cassette tapes to develop a new compositional technique known as specific music. This technique involved editing together pre-recorded fragments of nature and industrial sounds. The first Parisian concrete music fragments were assembled by Pierre Sch?fer, who later collaborated with Pierre Henry.
2. German electronic music
Karlheinz Stockhausen worked briefly at Sch?fer's studio in 1952, and for many years afterward worked on electronic music at WDR's studio in Cologne.
3. Japanese electronic music
While early electronic instruments such as the mateno sonata, the tremolo and the trombone were still little known in pre-World War II Japan, some composers of the time, such as Minao Shibata, already knew about them.
Several years after the end of the war, Japanese musicians began to experiment with electronic music; under the auspices of a number of organizations, composers were able to use the latest sound recording and processing equipment. These efforts demonstrated the fusion of Asian music with emerging trends, and ultimately paved the way for Japan to become a dominant player in the development of music technology decades later.
4. American electronic music
In the U.S., electronic music was created as early as 1939, when John Cage released Imaginary Landscapes No. 1, which utilized two variable-speed turntables, frequency recorders, a silent piano and cymbals. Keggie went on to create four other pieces in the Imaginary Landscapes series between 1942 and 1952, all of which included electronic elements.
In 1951, Morton Feldman, who would later collaborate with Keggie, composed a piece titled "Edge Crossing," scored for winds, brass, percussion, strings, two vibes, and extremely attractive sound effects, and accompanied by Feldman's illustrations.
5. Random Music
An important new development was the emergence and use of computers to compose music rather than manipulate or create sounds. Ioannis Xenakis pioneered what is known as stochastic music (French: musique stochastique), a method of composition that uses a mathematical probability system. A set of different probabilistic algorithms controlled by parameters are used to create musical compositions.
Extended information
Origins
Late 19th to early 20th century
The ability to record sound is often linked to the creation of electronic music, but is not absolutely necessary. The earliest sound-recording device was the phonautograph, patented in 1857 by Frenchman Edouard-Léon Scott de Martinville (?douard-Léon Scott de Martinville). It outwardly recorded sound, but could not be played back.
In 1876, engineer Elisha Gray issued a patent for an electro-mechanical oscillator. This "musical telegraph" evolved from his experiments with telephone technology and earlier surviving patents on electronic sound production. The oscillator was extended by Alexander Graham Bell for the early telephone.
In 1878, Thomas Edison further developed the phonograph from this oscillator, using a piston similar to Scott's device. While the piston continued to be used for some time, in 1887 Emil Bellina developed the disk phonograph.
Lee DeForest's 1906 invention, the 3-pole vacuum tube, had a profound effect on electronic music afterward. It was the first thermoelectric valve, or vacuum tube, and led to circuits that could create and amplify musical signals, play broadcast waveforms, calculate numerical values, and perform a variety of other functions.
Baidu Encyclopedia - Electronic Music