In this excerpt from the book Organised Sound published by the Cambridge University Press and written by Jonty Harrison, Harrison explores the factors that surround and make up sound diffusion. Sound diffusion, is initially defined as the real-time control of the relative levels and spatial deployment of sound during performance or playback. This concept is a contentious issue in electroacoustic music and this article explores the factors that define and affect this perception and occurrence of sound diffusion.
The excerpt introduces this concept by expanding on perspectives around the creation and perception of sound in music and composition. An important note that defines the perspective of the composer in this realm is, the encoding of ideas into a notation in the score is usually done without direct recourse to the actual sound but relies on the composer’s memory or imagination. In an expansion of the role of sound as it pertains to the idea, allowing for one’s imagination and memory allows for the incorporation of personal perspectives and characteristics to somewhat morph the sonic realities of tone and timbre as it pertains to a specific instrument. Conversely, the analysis of active listening as it pertains to music, entails many processes, one of the most important for making sense of a piece is segmentation. This is when the brain identifies and separates a musical piece, identifying objects and units of the musical flow. Denis Smalley identified this occurrence as ‘spectro-morphology’ (1986).
In electroacoustic music, space has been allowed to participate in defining gesture to a degree impossible in instrumental music, as manipulation of the acoustic components can change their relationship to the space they are present in. Feedback, modulation, harmonic incorporation, and amplification all affect the diffusion in a particular space.
Circling back to the role of composition as it relates to sound diffusion and electroacoustic music, the understanding of if something ‘works’ or ‘sounds right’ a compostion requires no further justificationin in that the compositional speculation has been proven through experimentation.
The concepts identified and expanded on in this article are contributing to my perspecitve on the topic I am researching for my element 1 and 2 submissions for this module, all pertaining to the audio visual contract as it pertains to sound in film and sound alongside material works.