The constant wave switch essentially just adds the pitch control to the formant CV. So it’s not quite the same thing, but you can get pretty close with a voltage source multed to pitch directly, and formant via an attenuator.

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Just had this start happening t mine as well. Did you ever find a remedy?

The only cause for pitch instability I’ve ever reliably identified is caused by the PITCH or FINE potentiometers going bad. Get in touch if you need help replacing this service@whimsicalraps.com

Thank you,
I sent an email this AM.

before selling my Mangrove with other modules to fund an mpc, i sort of “cloned it” as a custom unit for the er-301, so if you don’t have a Mangrove but you do have an er-301 you can try this:

of course it’s not the same thing and it is more limited soundwise but the internal working is very similar to how the Mangrove works, so the sounds are more or less in the same area.

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