This module multiplies or modulates two signals between them, which can come from the outside (X and Y signals) or from the internal oscillator that the module carries (Z). The X and Y signals have independent input level control and gain control to each one of them. The Z signal comes from a built-in internal oscillator (triangular or sinusoidal). The oscillator has a CV input with modulation level control and an external output which allows it to be used as a standard LFO.
The operations or modulations that can be done (selectable by switch) are X * Y, (the two outer signals to each other), Y * Z (outer signal by internal oscillator signal) and X * X (one of the outer signals by itself)