Available as an assembled Module and as a DIY project.
This Module is currently available.
Analog Wavefolder for adding harmonically related overtones
Farbfolder is an analog wavefolder for Eurorack. It does this weird and wonderful trick of folding the wave at the zero points, "squaring" a sine off with more and more sinusoid edges, thus adding odd harmonics.
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These merchants probably sell this module. Huh?
Making Sound Machines Farbfolder
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