The RLPG is a Resonant Low Pass Gate. This circuit operates in what is typically referred to as the "Both" mode on other Low Pass Gates. It operates on Frequency and Amplitude together. There are manual controls for Frequency Offset, CV Attenuation for one CV input (with a second unattenuated input) and a manual Resonance control. The resonance on this circuit is not limited, and will become quite aggressive and overdriven at high settings. Please use VTL5C1 vactrols for this circuit. Other types may work, but are untested in this version, and may require some modifications to the CV circuit to create the desired range and function.