[sdiy] Unique sounding modules that can't have voltage control?

[cheater cheater]

> The big problem with 2164 is that it has to terminate at a virtual ground

I think I've heard you mention this 10 years ago already. Funny!

Maybe at one point you'd like to write a walkthrough of how to do this in
various situations.


On Fri, Feb 9, 2024 at 8:24 PM David G Dixon via Synth-diy <
synth-diy at synth-diy.org> wrote:

> Not sure about Baxandall, but recently I figured out how to put the Korg
> morphing LFO circuit under voltage control using 2164.  I figure that if
> that is possible, then the Baxandall circuit should be a piece of cake.
> The big problem with 2164 is that it has to terminate at a virtual ground,
> so that means that some inverting opamps always have to be shoehorned in
> there, even if they are not really needed or wanted.
>
> I'll work up the Baxandall circuit this weekend and report back with my
> findings, and maybe a demo, next week.
>
> ------------------------------
> *From:* Mike Bryant [mailto:mbryant at futurehorizons.com]
> *Sent:* Friday, February 09, 2024 2:18 AM
> *To:* Adam (synthDIY); David G Dixon
> *Cc:* synth-diy
> *Subject:* Re: [sdiy] Unique sounding modules that can't have voltage
> control?
>
> [*CAUTION:* Non-UBC Email]
>
>
> > On 9 Feb 2024, at 2:27 pm, David G Dixon via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> >
> > I doubt that there are many things that couldn't be put under voltage
> > control with a 2164 and a bit of ingenuity.
>
> Baxandall tone control ?    I imagine it would make the op-amp unstable
> without a lot of extra caps.
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