Voltage controlled all pass filter 

¿¡DUDE!? THAT idea is SO INCREDIBLE!! Too bad it’s like 2 am where I am right now, but take my Word that this suggestion is just quite so interesting, that I’ll definitely remember to try this out and experiment a bit!! I’ve been playing with the 4046 CMOS Phase Locked Loop, but still I’ve only been keen enough to listen to its outs, but not send into something as a contributing CV modulation source! PLLs are pretty interesting circuits. I first encountered a decent explanation of one (one that helped to bring me to a level of understanding of PLL) in a book titled “Filter Design”, go figure! The final example here reminds me of a Wogglebug or a Rungler or the Erica synths’ Swamp, all are pretty neat contributors of uncertain sloppyslew stew, if I had to invent a description of my own. GREATSTUFF!!