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

[David G Dixon]

Actually, you just have to know how to do it.
 
Incidentally, I believe that I am the only living person who knows how to do it.

  _____  

From: Stephen Makdisi [mailto:shmakdisi at xvetrd.us] 
Sent: Friday, February 09, 2024 2:01 PM
To: David G Dixon
Cc: Mike Bryant; Adam (synthDIY); synth-diy
Subject: Re: [sdiy] Unique sounding modules that can't have voltage control?


[CAUTION: Non-UBC Email]	

I got a feeling a Baxandall is going to be a real pain to get under control with a 2164, but probably easier than tuning a Twin T or a Wein bridge network.

I think pretty much any circuit that requires both sides of the potentiometer, or even worse, both sides of a dual gang pot, is going to be difficult.

But not impossible. Not something I plan on trying, but not impossible. 

-Stephen


On Feb 9, 2024, at 14:20, 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.

________________________________________________________
This is the Synth-diy mailing list
Submit email to: Synth-diy at synth-diy.org
View archive at: https://synth-diy.org/pipermail/synth-diy/
Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
Selling or trading? Use marketplace at synth-diy.org


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20240209/f852d50e/attachment.htm>