The Z-1 is a is a two channel zero difference trrigger the can be CV controlled.
This is the evaluating click less switching control circuit used in the D-2, 4-Band Distortion module but with all the ins and outs accessible.
It works with both control signals and audio rate. It is completely DC coupled.
It can be used to detect zero crossings of signals and the direction of the zero crossing, to detect zero difference between between two signals, to add jitter to signals and many other things. It is mainly ment to be used in combination with other modules such as the Switch module but can also be used on its own.