CosmotronicVortex Complex Oscillator


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Cosmotronic Vortex

Fully analog and capable of through-zero FM, the Vortex is a complex oscillator from Cosmotronic with a vast array of juicy sound design options. Both oscillators track with incredible precision and there is no difference between the carrier and modulator as seen on some complex oscillators. Each features a 2-pole low pass filter to tame any undesirable harshness and the FM bus modulates the index of each individual voice.

VCO 1 starts with a Shape slider that morphs between the Tri and Saw with individual outputs for each. The signal then goes through a sinusoidal wavefolder whose response changes based on the waveform using a modified version of a Barrie Gilbert designed circuit—popularized by Open-Music-Labs and used with permission. This allows for thru-zero phase modulation which can be controlled with an additional slider. The source is automatically normalized to VCO 2, but external modulation sources can be patched in.

VCO 2, similar to VCO 1, starts with a waveshaper but it morphs from Sine to Tri to Saw. The signal then goes into a thru-zero amplitude modulation, or Ring Mod, section which has its own output that is pre-wavefold/filter. It then goes through its own unique wavefolder that is more aggressive when compared to the VCO 1 wavefolder.

With CV controls over all parameters, patch points for days, and superb pitch tracking when you need it, the Vortex can sculpt your perfect sound with ease.

Vortex Features

  • Thru-zero frequency, phase, and amplitude modulation
  • Tracking and temperature stability for both VCOs
  • No distinction between carrier and modulator
  • Linear and exponential inputs for modulation
  • FM bus modulates the index of each voice
  • Sync in supports soft and hard sync
  • Outputs for individual waveforms
  • Eurorack module
  • Width: 26hp
  • Depth: 27mm
  • Current draw: 190 mA @ +12V, 190 mA @ -12V
Cosmotronic Vortex Complex Oscillator Reviews