An improved method for generating non-linear multimedia effects by
employing two or more tweens. Specifically, a second tween mapping is
chained to a first tween mapping. A first time signal is received. The
first tween is employed to map the first time signal into a second time
signal. The second tween mapping is employed to map the second time
signal into an output that varies in a non-linear fashion with respect to
the first time signal.