Random SourceSerge Variable Q Filter (VCFQ)


In Stock Available immediately!
  • Free Shipping
  • No Hassle Returns
    No Hassle
  • Warranty
  • Low Price Guarantee'
    Low Prices

Random Source Serge Variable Q VCF

The Variable Q VCF (or VCFQ, for short) from Random Source is a skiff-friendly Eurorack adaptation of what is perhaps the most famous Serge filter. It is an effortlessly thick and colorful 12dB/oct multimode filter with ultra-smooth resonance that never ceases to amaze. Amazing tonal variety comes from combining outputs, automating resonance settings via CV, and adding grit using its adjustable-gain input.

Simple filtration is only one of the VCFQ's many uses, however. Its amazing trigger input turns rising-edge pulses into thick analog kicks and toms which roughly track notes thanks to a dedicated 1V/oct input. This module also becomes an ultra-powerful modulator in "Lo" mode, with decaying/syncable LFOs well within grasp using the trigger input, along with free-running oscillation when self-patched. When fed stepped sequences, sample and hold, or other LFOs, the VCFQ can even function as an effective slew limiter. And that's not all: for those lucky enough to own two VCFQs, dual-peak resonance and an ultra-thick 24dB/oct low-pass mode offer some of the most rewarding synth sounds in existence. In short, adding a VCFQ to one's Eurorack system is always worthwhile.

Serge Variable Q VCF Features

  • Analog multimode filter designed in collaboration with Serge Tcherepnin
  • Automatic Gain Compensation and Variable Gain audio inputs
  • Trigger input
  • 1V/oct and attenuverted frequency CV inputs
  • Attenuated Q CV input
  • Low Pass, Hi Pass, Bandpass, and Notch outputs
  • Hi/Lo range switch
  • This is the skiff-friendly, SMD version of the Random*Source VCFQ
  • Eurorack module
  • Width: 14hp
  • Depth: 26mm
  • Current draw: 50 mA @ +12V, 50 mA @ -12V
SignalRelated ArticlesBuying Guide: Eurorack FiltersFrom Classics to New Approaches to Modular Synth Filter DesignLearning Synthesis: FiltersA Guide to Sweeping SuccessMake Noise QPAS and YouMultipeak Filter and Binaural MadnessPatching Tips: Filter PingingPercussive Modular Synth Sounds—No Oscillators RequiredRandom*Source Serge GTO OverviewA Fresh Update to an Essential Module in the Serge Modular Catalog
Random Source Serge Variable Q Filter (VCFQ) Reviews