Noise source

The NOISE STATION module is the definitive source of noises and filters to serve as the basis for creating percussion and noise related sounds. In its Generator section it has 7 independent noise sources with various tones and spectral distributions. In its analog Filters section there's 4 fixed filters and 2 variable filters. These filters alters the spectral distribution in many ways, allowing for the creation of very exclusive and powerful noise tones.

http://www.electronicmusicworks.com/noise-station-304.html