Granular Synthesis   

Granular synthesis is a technique based on an alternative model of sound.
The traditional model is based on the Fourier analysis of a complex timbre into a series of simple tones, each with its own amplitude and frequency characteristics.  The granular model conceives of sound as a collection or "cloud" of extremely brief sound events or "grains" which occur with varying density and within varying frequency ranges. In this way a kind of statistical representation of a sound can be achieved.
(see stochastic)

Recent work involving the granulation of sampled sound has explored techniques of time compression and expansion as well as pitch shifting effects. 

  normal file    granulated file 
See Also:
additive synthesis  FM synthesis 
subtractive synthesis  wavetable synthesis