Schematics / The Wavolver Waveshaper
The "Wavolver" Waveshaper by Ian Fritz as he present it here on this thread : http://electro-music.com/forum/post-323577.html ,visit his home page http://home.comcast.net/~ijfritz/sy_cir6.htm for full description on this circuit ,scope shots and demo , the brief description from there :
The waveshaper circuit described on this page produces a wide variety of evolving waveforms in response to an external control voltage. Driven by a triangle wave, it can produce an output wave that continuously evolves from a triangle to an antisymmetric pulse waveshape. In addition, the section of the antisymmetric waveform that is at a zero-volt level can be replaced by an evolving series of successively folded triangular sections, somewhat in the spirit of the popular Serge Wave Multiplier.