Synton 3017 VCF Module

The 3017 is a 2 pole state-variable filter with two outputs. One is bandpass and the other is selected by a control for lowpass, notch, or highpass.


This description is from the Series 3000 Modular Synthesizer Instructions Manual.






This reference diagram shows the values of the parts.




The various controls interacted so I ended up adjusting the scaling, then setting the preset and then adjusting the HF amplitude.

This diagram describes calibration




This image shows lowpass and bandpass operation.


This image shows notch and bandpass operation


This image shows highpass and bandpass operation


The minimum self-oscillation frequency was ~22 Hz.


The maximum self-oscillation frequency was ~5 KHz.


This image shows lowpass and bandpass with some resonance.