The Analogue Systems RS-110 is a resonant analog multimode filter with excellent sound, resonance and four simultaneously available filter types.
An insert function in the feedback loop (Res In/Res Out) allows you to insert other audio processors or to feed back a filter output in the Res In which changes the  behaviour of the filter. Generally it is fun to cross-connect the separate outputs with the CV and audio inputs and to use the filter in a modular way.

In this video, we demonstrate all filter outputs and different feedback patches to change the sound characteristic of the filter.