Microsound composition operates simultaneously on multiple time scales

A multiscale approach to composition allows compositional intervention on every time scale simultaneously. Operations on the micro time scale generate structures perceivable at higher time scales: grain density variations create texture changes at the meso level; grain duration variations create timbre changes. Particle density controls opacity/transparency - density determines whether a cloud is a sparse pointillist texture or a solid continuous tone. By controlling density, composers can cause sounds to coalesce (cloud formation) and evaporate (cloud disintegration) as compositional gestures. The approach recognizes that different time scales have independent perceptual properties that cannot be mechanically transposed from one to another.

Examples

A gradual increase in grain density over 10 seconds transitions from a sparse rhythmic texture to a continuous droning tone - a macrostructural gesture built from micro-level parameter change.

Assessment

What is meant by a multiscale approach to composition with microsound? Describe a specific manipulation at the micro time scale and explain what perceptual effect it produces at the meso time scale.