Inspired on Electro Harmonix Polyphase. Ready to challenge yourself with a rare vintage unit?
Welcome to the experimental guitarist’s paradise. The Poly-face offers a level of interactivity way beyond a typical pedal to give you the most important thing: total control.
Its complexity enables you to have a level manage over the effects parameters that are not that far away from what a synthesizer can offer.
Not only does it deliver the classic phase sounds, but it also reaches new dimensions with its envelope filter mode. It is no beginner project for sure; controls for rate, feedback, envelope sensitivity, envelope modulation, and modulation rate plus a sweep toggle will do everything between funky envelope filter to Leslie-like rotary sounds.
Is it necessary to mention the enormous potential that this pedal hides behind these features?
Now let us go to the technical part; make sure you source your TL1054 from a trusted source. Also, keep in mind there are three optocouplers. If you decide to use LDRs and LEDs, you need to cover them (some guys put them in a heat sink tube) because otherwise, the light of one will affect multiple light-sensitive resistors at once.
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.