Sigmund is far from just another delay: it consists of four discrete delay units, each with its own, independent set of parameters offering an incredible degree of sound-shaping freedom. There's an ancient saying, often attributed to Aristotle: The whole is greater than the sum of its parts. With Sigmund, this is especially true: each of the delay lines has complementary modules built in, independent from the feedback loop:
Multi-mode Filter (can work either in or outside of the feedback loop)
Overdrive module
Amplitude modulator (for tremolo effects)
But that's not all: Sigmund has two general-purpose Modulators which can be used to auto-modulate some of the delay lines' internal parameters. There are three different modes a Modulator can operate in: