This filter is popularly known as the multimode filter in the Arturia Microbrute. It has a strong drive sound when the resonance is turned up. The design is based on the one created by Yves Usson, which closely follows the original article by Steiner explaining the filter’s operation. Some modifications have been made, such as a redesigned power supply, input buffer, active pregain control, active volume control, additional low pass filtering to prevent unwanted oscillation, and limiting resistors on the sweep control to keep it within the guitar range. It is recommended to use a meter for calibration.

Summary created by AI from the original source.