This term is generally associated with ’classical’ electroacoustic composition that privileges the notion of ’material’, which is investigated and developed during the compositional process in the studio. In this context Sound Source simply refers to the physical provenance of such material, for example a vibrating body recorded in the studio, an environmental recording, or a synthesiser output. It can also refer to the basic structuring units in a given compositional conception or strategy, for example sonic grains or vowels and consonants extracted from speech.
See also:Sound Event, Sound Object
Bibliography: Dahlhaus, Carl (1970). ─sthetische Probleme der elektronischen Musik