Overfolder

Complex analog voltage controlled wavefolder

The Overfolder is a complex analog wave folder, containing two cascaded folding sections, labeled “Fold” and “Over”, as well as a symmetry control (“Sym”), which offsets the input signal for timbral variation. Each of these sections has a manual control knob as well as an external CV input. At the bottom of the module are the audio input and output. Right above are the three CV inputs, and above them are the manual controls. At low settings of the “Fold” and/or “Over” knobs, the module is silent, which allows for patching a voice without a VCA, for example. There are also certain settings where with no input signal present the module outputs various colors of noise, which is another alternative use for it. This is normal behavior for this circuit topology. The module works with audio as well as control voltages. In audio use it works best with Triangle, Sine and Saw waves from an oscillator. Square waves don’t work well, as they are not easily “folded”, and other sources that are not oscillator waves may or may not yield useable/interesting results. Definitely get acquainted with it using a sine or triangle wave before you start experimenting with different sound sources.

https://synthdiyguy.wixsite.com/vbmodulardiy