This effect examines the sounds that come from subtracting one signal from another, especially two similar signals. Try bit reduction, decimation, filtering, saturation (and more) and see what comes out of very small changes between paired module parameters.
Place a processor in between input and output A, and likewise for input and output B. For module pairs (I.e. two bit redux modules), oftentimes the resulting signal is very low. The signal is brought back to the module input level through two envelope followers and some math. This allows for some interesting dynamics controls as well.
Some preliminary examples are provided here.