Available as an assembled Module and as a DIY project.
This Module is a prototype or in a concept phase.
3phaseVCO 6hp
The core of this module is three distorted sine-ish waveforms 120° apart.
These outputs are labelled A, B, and C.
A, B, and C are summed together with overdrive to make the MIX output.
The MIX knob and CV applied to the MIXCV jack modulate the level of A in this mix, morphing between two flavours of rounded square wave at each end, with a sweet spot near the middle that mimics 3X the main frequency (octave + perfect fifth).
The MIXCV knob attenuates whatever is plugged into the MIXCV jack.
FREQ and FINE adjust the frequency between 0.08Hz (~12 seconds per cycle) and ~1.7kHz. Adjust C1, C2, and C3 to modify this range.
A notable drawback feature of this simple design is that the amplitude of A, B, and C is proportional to frequency. Expect approx. 5Vpk-pk at the lowest frequency and 12Vpk-pk at the top end of the range.
LIN - linear frequency modulation input (with attenuator)
EXP - 1V/octave control voltage input.
1V/octave tracking is calibrated with the trimmer accessible from the front panel between the FREQ and FINE knobs, expect at least 2 octaves of good tracking in the middle of the range.
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