Thru Zero Complex Oscillator

A new complex oscillator, featuring two independent oscillators. Both voices have a unique signal path and timbral flavour, but they become entangled with each other through complex cross modulations.
Features inlude the Thru Zero trinity; Frequency, Phase and Amplitude modulation are all possible.
Each oscillator also has its own Low Pass Filter, which works great to mellow the harsher tones from complex intermodulations.

Each VCO has great tracking and temperature stability, there is no distinction between carrier and modulator.

The FM bus let's you modulate the FM index of each individual voice, with linear and exponential inputs for external sources. There are also inputs for Sync in, with both soft and hard sync.

VCO 1
The left VCO has a shape function that let's you morph between triangle and saw, also has a seperate output.

This waveform is then sent into a sinusoidal wavefolder, which changes it's timbre dramaticaly based on the set shape of the waveform.

The third slider set the depth of the Thru Zero Phase Modulation. The source is normaled to VCO 2.
External modulation sources can be patched in, and the depth can also be modulated with CV.

The circuit is based on a modified version of a design by Barrie Gilbert from 1977, popularized by Open-Music-Labs (used with permission)

Lastly there's a 2-pole Low Pass Filter, before going out the MAIN output.

VCO 2

The first slider is a continuous waveform shaper, that morphs from sine to tri to saw.

This waveform then enters the Thru Zero Amplitude Modulation (Ringmod) section. The slider set 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 ring modulation part also has a seperate 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.

Release date: TBA

https://www.youtube.com/watch?v=0oha5TzgQ7E

• 190 mA +12V
• 190 mA -12V
• 0 mA 5V
• 27 mm Depth

This Module is an early prototype, a concept in development, or an AI mockup