Archive of the former Yahoo!Groups mailing list: MOTM

SEM. I'm a filter fool.

On Feb 16, 2009, at 4:30 PM, Paul Schreiber wrote:

> After reading everyone's inputs for what is desired for a DIY/pc
> board only
> (or module, but all in old fashioned through-hole technology) I've
> decided
> to work on the SEM VCF with Voltage-Controlled Output Morphing.
>
> For all you solder jockeys out there, it will be as complicated as the
> MOTM-480 VCF. But with ∗more∗ parts. Yippee.
>
> In order to take advantage of all it can do, it will have 6 panel
> controls
> but 11 jacks. I plan to use a standard BR-1 bracket/MOTM pc board size
> ∗unless∗ the layout goes south and won't fit. It will be ∗very∗ dense.
>
> There will be 2 audio inputs, voltage-controlled resonance and
> voltage-controlled output morphing (along with HP/BP/LP/Notch ∗fixed∗
> outputs). The MORPH sweeps between HP/BP/LP on a dedicated output.
>
> Even though it uses 'vintage' op amps, I just checked Digikey/Mouser
> and
> they have tons in stock. There are several LM13700 dual OTAs but
> again not
> an issue.
>
> So, one last 'poll':
>
> What would you rather see ∗first∗:
>
> a) some sort of FFB/parametric EQ boards?
>
> b) the SEM VCF boards?
>
> c) the Cloud Generator in all it's assembled SMT glory?
>
> Paul S.
>