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 961 interface is used to convert and process gate commands. The upper part of the module derives a gate signal from any audio signal (percussive sounds are best). The two S-Trig-In / V-Trig-Out sections convert the old Schmitt trigger (Moog gate from the 60s) to voltage trigger; i.e. the normal Eurorack gate.
The lower two units are of the same design, with six inputs in rows A and B respectively. Here Eurorack gate (V-trig) is converted to S-trig, with the special feature that each row is a so-called gate combiner. Both rows (A&B) are output together at S-Trig-Out. The knob shifts row B in a time range from 40 milliseconds to 4 seconds.