Stochastic music

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Stochastic music is a term for musical composition processes in which stochastic processes are used (compare aleatoric ). The term goes back to the composer and architect Iannis Xenakis (1922–2001).

The process of composition is initially based on Xenakis on visual forms. From these he derives formulas and ways of combining them in order to convert them into musical notes and music, for example using a calculating machine . In doing so, he uses random processes , probability calculations and game theory . The composer himself compares the resulting, often deforming sound images with clouds and galaxies and describes them as “stochastic music”.

By using technical aids such as the GENDYN system he developed , Xenakis transfers the idea of dynamic stochastic compositions to the level of sound design . With the help of processes such as granular synthesis , sound clouds are automatically generated that are stochastically organized on both the coarsest and the finest structural level.