The Hungry Robot VCF is an all analog, 4-pole low pass filter with a self-oscillating resonance control. It is a close replication of the filter circuit found on the famous Prophet 5. It uses a HM2040 which is a high quality, faithful replication of the original SSM2040 chip. This resonant filter has a beautiful tonal quality. The over-sized knobs provide a satisfying tactile response. The cutoff frequency can be controlled by external control voltage. It has a built-in attenuator and invert switch for the incoming CV. CV input does not track at 1V/Oct, but is scaled to act as a VCA when a 5V signal is applied to CV input. As with all Hungry Robot "Modular Boxes" the VCF can be powered by a simple 9V DC, Negative Center power supply.
-FREQUENCY: Sweeps the cutoff frequency of the filter.
-CV: Attenuator for incoming CV input.
-RESONANCE: Sets resonance of filter. Small volume drop is to be expected. Will self-oscillate at higher settings.
-INVERT: Inverts the incoming CV input. Toggle to the right to invert incoming CV
-IN: Patch Audio Signal In
-CV: CV input for Frequency. Allows for CV control of this parameter.
-OUT: Patch Audio Signal Out
Dimensions: 4.7” x 2.6” x 1.5”
Power: 9V DC - Negative Center - 2.1mm Barrel
(ISOLATED SUPPLY PREFERABLE)