Vortex
Complex Oscillator
Introducing a brand-new 100% analog complex oscillator, featuring two independent VCOs. Each of these voices possesses its own distinct signal path and character. They intertwine through complex cross modulations, unveiling entirely novel timbral possibilities.
Key features encompass the Thru Zero trinity: Frequency, Phase, and Amplitude modulation. Each oscillator is also equipped with its dedicated Low Pass Filter, which excels at smoothing the more intense tones arising from intricate intermodulations.
Both VCOs exhibit exceptional tracking and temperature stability, eliminating the need to distinguish between carrier and modulator roles.
The FM bus governs the modulation index for each individual voice, accommodating linear and exponential inputs from external sources. Additionally, inputs for Sync In are available, offering both soft and hard sync options.
The left VCO signal chain starts with a shape function, that lets you morph between triangle and saw. This waveform is also available as a separate output.
Next is a sinusoidal wavefolder, which changes its response dramaticaly based on shape of the waveform. The circuit is based on a modified version of a design by Barrie Gilbert from 1977, popularized by Open-Music-Labs (used with permission)
This circuit also creates the possibility of Thru Zero Phase Modulation, here the depth is controlled with the third slider. The source is normaled to VCO 2, but external modulation sources can be patched in, and the depth can also be modulated with CV.
Lastly there's a 2-pole Low Pass Filter, before going out the MAIN output. All parameters can be CV controlled, and feature handy attenuators at the inputs.
The first stage is a continuous waveform shaper, seamlessly morphing from sine to triangle to saw.
This waveform then enters the Thru Zero Amplitude Modulation (Ringmod) section. The slider sets the depth of modulation, with the source normalized to VCO 1. The depth can be CV controlled, and an external source can be patched as well. The result is also available on a separate output, pre wavefolder/filter (VCO 2 sine).
The third slider is a wavefolder, it's based around a novel wavefolding topology, with a unique and more aggressive sound compared to the sinusoidal folder of VCO 1.
The wavefolded signal goes into a 2 pole Low Pass Filter, and out of the MAIN output.
