[sdiy] low voltage filters

[Chris McDowell]

Thanks for the suggestion, but in this case, I do need the filter to be voltage controlled! 

Cheers, 
Chris 

> On Apr 19, 2017, at 3:27 PM, Quincas Moreira <quincas at gmail.com> wrote:
> 
> Check out the filter in Ray Wilson's battery powered noiseboxes. I've made the WSG filter a few times, works great. The Noise Toaster has one too.
> 
> http://musicfromouterspace.com/index.php?CATPARTNO=WSG001&PROJARG=WSG2010%2Fwsg_page1.html&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1097&VPH=585 <http://musicfromouterspace.com/index.php?CATPARTNO=WSG001&PROJARG=WSG2010%2Fwsg_page1.html&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1097&VPH=585>
> 
> On Wed, Apr 19, 2017 at 3:22 PM, Oren Leavitt <obl64 at ix.netcom.com <mailto:obl64 at ix.netcom.com>> wrote:
> 
> 
> On 4/19/17 3:10 PM, Gordonjcp wrote:
> On Wed, Apr 19, 2017 at 02:38:13PM -0500, Chris McDowell wrote:
> 
> - MS-20 Style, like the monotron
> This is probably your best bet.  There was also a "guitar synth" design floating about that appeared to be a single-supply 6V version of the Steiner Synthacon filter, which might be okay.
> 
> - Vactrol, H11F1, or similar
> Whatever the problem, vactrols are never the solution.
> 
> The point of this is that I have DCOs and ADSRs working wonderfully in a 3.3V environment. Some dirt is okay, I say. Super ideally, I want to implement an SVF with a single 3.3V supply, suggestions toward reality / sacrifices are welcome. I imagine this would work fine with vactrols, but I don't want to design anything with parts I can't buy from mouser, hehe.
> You could try working with a +3.3V/+6ishV supply and treating 3.3V as "analogue ground".
> 
> Some of the old PAiA 2720 filter designs might work, too.
> 
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> 
> -- 
> Quincas Moreira
> Test Pilot at VBrazil Modular
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