The modular system once developed by Robert "Bob" Moog, including its development process, went through a long production period between 1964 and 1981. At that time, the novel, electronic instrument was an avant-garde pioneering work that still had to be explained to the public; but ultimately found more and more interested parties. Behringer has transferred the generously dimensioned dimensions to the compact Eurorack format and paid close attention to ensuring that sound and function are in no way inferior to the cult object.

The Behringer 923 Filters / Noise Dual Filter and Noise Generator combines two types of noise, each with a lowpass and highpass filter. The resonance-free filters operate in a frequency range of 10-10000 Hertz with a slope of 6 dB each. Together with the noise generator, which produces pink and white noise, a range of very different noise characters is possible by combining one or both filters.