Twin Peak Filter

The core is the TwinPeak Filter principle, described in the TWP with Joystick module.
CV1 and CV2 are normalised to Audio In and offers 1V/oct tuning.
Direct tracking to both filters with Tr1 and Tr2. Both controllers are tuned for fast pings and ring sounds to 0.5V/oct.
Open Resonance fully clockwise to set self resonance to get a sine wave. To play this "VCO'" it is well tunded at 1V/oct over a couple of octaves. Use XFM-2 to modulate F1 from F2. You get powerful FM sounds.
LP/BP = BP both Filters are active, LP only F1is active. So BP is general TWP-mode!
Res-mod: it is CV control for Resonance or Q-factor of both filters. Good for vocal spectra when modulated with a square wave.

http://www.xn--klangbaukln-zfb.de/klangbau-in-koeln/twin-peak-resonator/