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

[Mike Bryant]

Good luck.  Where you will probably end up is the long obsolete LMC835 chip which was the usual solution before we went DSP.  But that is digitally stepped so no use for voltage control.
________________________________
From: David G Dixon <dixon at mail.ubc.ca>
Sent: 09 February 2024 19:19
To: Mike Bryant <mbryant at futurehorizons.com>; 'Adam (synthDIY)' <synthdiy at adambaby.com>
Cc: 'synth-diy' <synth-diy at synth-diy.org>
Subject: RE: [sdiy] Unique sounding modules that can't have voltage control?

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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20240209/c2f0bc94/attachment.htm>