The Voltage Modular Miniverse Filter is a 24dB/oct, low pass filter based on the famous transistor ladder filter.
If you're not familiar with how filters work, a low pass filter allows frequencies below the cutoff frequency setting to pass through, but blocks frequencies above the cutoff frequency.
Inputs, Outputs, and Controls
Cutoff Frequency- Sets the frequency where high-frequency attenuation begins.
Emphasis- More commonly referred to as "resonance," this emphasizes sound energy at and around the cutoff frequency by adding feedback from the filter's output back to its input. This is useful for creating commonly heard synth "wah" tones, particularly when the cutoff frequency is modulated with an envelope generator.
1V/Oct- This is a cutoff frequency modulation input intended to be used with keyboard CV inputs. It allows the cutoff frequency to follow or "track" notes played so that the relative brightness of notes increases as ascending notes are played. This allows the cutoff frequency to stay constant as the pitch frequency increases.
Amount of Contour- Applies modulation from the filter contour generator to the cutoff frequency. Turning it clockwise adds more modulation. Because filter mod is additive in nature, it's a good idea to dial the Cutoff Frequency knob back when using filter mod.
Modulation inputs 1/2 input jack and attenuverter - These are used for externally modulating the cutoff frequency. They're useful for adding filter sweeps or "wah wah" effects.The mod amount knobs are bipolar- center position is off; turning the knob to the right applies positive modulation, and turning to the left applies negative modulation.
Signal Input- The signal input for the filter. This usually would come from an oscillator wave output or a mixer.
Signal Output- The signal output of the filter.