||A "nice" function that is used as a basis for defining
the pitch, instrument selection or velocity of a voice.
||This class provides the visualization of the composition.
||The class generating the sonic events.
||A collection of some unrelated utility functions.
||This class represents a voice that consists of a set of three
functions [0..1] -> [0..1] that determine the pitch, velocity and
instrument at time t where 0 <= t <= 1.
||The set of five voices that define the composition.