Electronic Music began to develop in the 1940's with advances in technology. What were the two approaches to Electronic music in the 40's and 50's, and from which country did each originate? What was the 1970's evolution of these approaches?

Electronic music originated in the 1920s and 1930s where electronic instruments and the first compositions for electronic instruments were first introduced. However, it had its initial milestone in 1948, with the broadcast of the Concert de Bruits by Radiodiffusion-Télévision Française, influenced by the Frenchman Pierre Schaeffer who created the musique concrète, where the composition was made from noises generated by tape players, in addition to including sound manipulation by varying the speed or reading direction of the recordings, leading to the development of music with electroacoustic tapes. At the same time, the German Werner Meyer-Eppler was experimenting with sound synthesis, while speculating about its possible application in music. In 1951, Meyer-Eppler and composer Herbert Eimert joined Robert Beyer, and created the first elektronische musik (electronic music) studio. Although they used recording and editing techniques similar to those performed at RTF studios in Paris, these techniques were applied only to sounds of electronic origin, generated by electrical oscillators. A major new development was the advent of computers to compose music through algorithmic composition that was first demonstrated in the 1950s. In the 1970s, electronic music began to have a significant influence on popular music, with the adoption of synthesizers polyphonic, electronic drums, electronic drums and record players, through the emergence of genres such as disco, krautrock, new wave, synth-pop, hip hop and EDM.