Root Locus

Multimode Filter

Root Locus is an analog 12dB/octave multimode filter, based on the CGS512 VCFQ filter. It adds a dual input crossfading mixer with gain control and a variable mode output with cv control for sweeps between filter modes, aiming for an extensive tonal variety! It also features a Ping input that allows for an impressively wide variety of percussive sounds. The Sub Range switch makes it a very versatile CV filter too, able to filter control voltages as well as transforming it to a VC Slew Limiter and Quadrature LFO while in self oscillation.

Features:

• Two input crossfading mixer with CV control.

• Voltage controlled Mode out for smooth sweeps between filter modes.

• Individual filter outputs for low pass, band pass, notch and high pass filters.

• Frequency CV input with attenuverter and additional V/oct input.

• Voltage Controlled Q.

• Ping input for striking the filter.

• Sub range switch for filtering control voltages and quadrature LFO operation.

https://nekyiacircuits.com/root-locus/