Fold 6

A six-stage hybrid series/parallel wavefolder in 4 HP. Folding a signal over itself adds harmonics, and having both a main (series) output and an alternate (parallel) output gives one module the tones of both diode folder families. An integrated symmetrical soft clipper holds the outputs to about 10 V peak to peak, making overdriven sounds at high fold ratios easy, and the shape control drives that clipping stage until the folded waves turn into pulses. Two signal inputs mix audio sources or add a DC voltage for asymmetric folding; symmetry also has its own knob, and fold and shape both take control voltages. It suits feedback patching, CV folding and frequency multiplication as well.