VCF

AS3320, wavefolded resonance, voltage controlled low pass filter. 

This is the functional prototype of our voltage controlled, 4 pole, low pass filter, with the AS3320 at its core. It has 1 input, 1 output, 2 frequency modulation controls and 1 resonance modulation control. We added a wavefolder and diode distortion to the resonance feedback loop, with a switch to select between either just wavefolding, or both. 

Manual controls:

• Frequency 
• Frequency modulation depth 1
• Frequency modulation depth 2
• Resonance 
• Resonance modulation depth
• Input level 
• Resonance Wavefolding/distortion switch 

CV controls:

• Frequency modulation 1
• Frequency modulation 2
• Resonance modulation 

Audio:

• Input 
• Output

10hp 

+12v / -12v power requirement