<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Thanks for the suggestion, but in this case, I do need the filter to be voltage controlled! <div class=""><br class=""></div><div class="">Cheers, </div><div class="">Chris </div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 19, 2017, at 3:27 PM, Quincas Moreira <<a href="mailto:quincas@gmail.com" class="">quincas@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">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.<br class=""><br class=""><a href="http://musicfromouterspace.com/index.php?CATPARTNO=WSG001&PROJARG=WSG2010%2Fwsg_page1.html&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1097&VPH=585" class="">http://musicfromouterspace.com/index.php?CATPARTNO=WSG001&PROJARG=WSG2010%2Fwsg_page1.html&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1097&VPH=585</a><br class=""></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Apr 19, 2017 at 3:22 PM, Oren Leavitt <span dir="ltr" class=""><<a href="mailto:obl64@ix.netcom.com" target="_blank" class="">obl64@ix.netcom.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br class="">
<br class="">
On 4/19/17 3:10 PM, Gordonjcp wrote:<br class="">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Wed, Apr 19, 2017 at 02:38:13PM -0500, Chris McDowell wrote:<br class="">
<br class="">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
- MS-20 Style, like the monotron<br class="">
</blockquote>
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.<br class="">
<br class="">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
- Vactrol, H11F1, or similar<br class="">
</blockquote>
Whatever the problem, vactrols are never the solution.<br class="">
<br class="">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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.<br class="">
</blockquote>
You could try working with a +3.3V/+6ishV supply and treating 3.3V as "analogue ground".<br class="">
<br class="">
</blockquote></span>
Some of the old PAiA 2720 filter designs might work, too.<div class="HOEnZb"><div class="h5"><br class="">
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</div></div></blockquote></div><br class=""><br clear="all" class=""><br class="">-- <br class=""><div class="gmail_signature" data-smartmail="gmail_signature">Quincas Moreira<br class="">Test Pilot at VBrazil Modular</div>
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