Introducing the "One Chip Chorus"!

[Ksander]

Looks like it. I'm off to the breadboard. Thanks a lot!

[Ksander]

here's something from searching. is it this?

I'm a bit confused by the drawn schematic. *Is the oscillator a 'normal' Phase Shift Oscillator (PSO)?* Looking up the regular implementation, the network of capacitors/resistors seems to connects between the op-amp output (pin 14) and negative input (pin 13), which this one does not do? *And why does it connect to the op2-out?*

I now have a hybrid on the breadboard of the Merlin version and something like the original, which implements the latch-up circuit with minimal delay time, but also uses a regular PSO on pin 13/14 with (C1,C2,C3=)C=22uF and (R1=R2=R3=)R=15k, and Rf = 470k + a 1M pot to control PSO gain; with Vref pin as GND. This gives a pretty sine as PSO output, and Vref wobbles along.

At start-up, the circuit produces a LOUD eerie sweeping sound (courtesy of the latch-up circuit, I guess), but after that, it sounds like a chorus. Compared to clips of the Merlin OCC it is much more subtle.

I guess I'm a bit late to this party   

[duck_arse]

here's something from searching. is it this?

 

you were supposed to answer yes or no.

[Ksander]

here's something from searching. is it this?

 

you were supposed to answer yes or no.

Maybe

[sinthmart]

I tried this MOD on myself, but it did NOT work at all(( I put between the 6th and 8th pins and just a 1 megaohm resistor and a 1 megaohm variable resistor in series, and included a 0.47 microfarad capacitor in this chain, and nothing. You can only hear that this connection dampens the delay repeats, but no chorus or flanger((.

What could it be? Who remembers such experiments?