Research On Homomorphic And Heteromorphic Sound Combination And Its Application In Oliveira’s Electronic Music "Magma"

Since the second half of the 20 th century,with the progress and development of science and technology,composers have been further exploring and studying in electronic music creation.From the collage of "music concrete",the processing of "tape music",the synthesis of "electro acoustic music" to the control of "computer music",in just 70 years,the creative subject object,creative technology and creative means of electronic music have been opened up a new world.As the focus of creation in recent years,mixed music contains complex and diverse sound materials in its real musical instruments and electronic music.How to deal with the contrast and integration between them is one of the important problems in mixed electronic music works.The composer Joao Pedro Oliveira’s creative style is to achieve the most ideal integration effect when he extremely pursues the combination of instrumental performance and electronic music.This paper focuses on the material selection,writing,processing,combination,organization,layout and other aspects of his electronic music work "Magma".This paper is divided into three chapters: the first chapter summarizes and defines the mixed electronic music,introduces the composer Joao Pedro Oliveira’s life and his works and achievements,and expounds the creation and paragraph structure of this work;The second chapter discusses the music materials,sound materials and sound forms of the works,in which the sound part of acoustic instruments involves pitch organization,rhythm design and special performance method,and the sound part of electronic music involves timbre synthesis and deformation modulation,and further classifies these two kinds of materials into specific sound forms.The third chapter puts forward the concept of homomorphic and heteromorphic sound combination mode,explores its vertical combination and use characteristics,summarizes the specific application modes of homomorphic and heteromorphic sound combination mode in "Magma",summarizes the four structural functions of homomorphic sound combination mode: introduction,transformation,end and connection,and summarizes the development function and internal development mode of heteromorphic sound combination mode,Finally,the construction methods and principles of the two forms of combination in the whole music layout are extracted.