[sdiy] low voltage filters

[Oren Leavitt]

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.