"Below the level of the musical note lies the realm of microsound, of sound particles lasting less than one-tenth of a second. Recent technological advances allow us to probe and manipulate these pinpoints of sound, dissolving the traditional building blocks of music - notes and their intervals - into a more fluid and supple medium. The sensations of point, pulse (series of points), line (tone), and surface (texture) emerge as particle density increases. Sounds coalesce, evaporate, and mutate into other sounds."
Hear this week's Mixing It for more, live recordings from All Tomorrow's Parties at Camber Sands last weekend.
See also SuperCollider, an environment and programming language for real time audio synthesis.