Vintage Synth Lab - VCF '74

Vintage Synth Lab - VCF '74 - another dual filter from the last century which would hard to emulate or find at all. It features two of the Korg Univox Synthesizer's filter which was known for its lush and organic sound. The filter design was also adapted to the modern modular environment. 

The Vintage Synth Lab - VCF '74 is a 14HP voltage controlled filter in Eurorack format. VCF-74 features a dual analogue high-pass and low-pass filter, cascaded (series, from HP > LP). The discrete diode filter circuit is inspired by the 1970s Univox Mini-Korg synthesizer's "Traveler" filter section which provides warm, organic sound to your modular system. However, this design was not only adapted for Eurorack, but is feature enhanced for a wide array of possible filter characteristics.

A stage boost switch allows you to drive the 2nd filter section (Low-Pass) with a +5.3dB signal boost from the High-Pass output signal creating a warm saturation and varied resonance to signal ratio/dynamics. Independent manual resonance controls per filter section allows you to fine-tune a wide variety of focused sound. Input and Output level controls allow you to optimize dynamic range, including how hard you drive the filter--which drastically changes the dynamic interplay between signal and harmonic resonance. Both High-Pass and Low-Pass circuits have independent cutoff controls. Independent CV inputs for cutoff and resonance of each filter section, and attenuation/gain for CV to cutoff provide superior control over filter behavior. The VCF-74 can be set up as a Low-Pass, High-Pass, or Band-Pass filter. Width of the Band-Pass can be adjusted by simply dialing in the offset controls appropriately.