[sdiy] Vocoder

patchell patchell at silcom.com
Sun Apr 27 20:36:46 CEST 2003


    They are just a  regular old 2 pole filter.  Nominal Q is 50.  The
circuit itself is a Mosberg Resonator (Vogel Resonator)...25 years ago, I
was sort of fascinated by this circuit...If I had it to do over, I would
have just used a plain old State Variable.

Craig Critchley wrote:

> From: "patchell" <patchell at silcom.com>
> > >
> > > I wonder where the ringing comes from ... the
> > > increased Q?
> > >
> > > Michael.
> >
> >     The electronotes article suggested a Q of 50 to 75...I used 50...I
> suspect
> > that something a bit lower might be bettter, maybe around 25....still,
> this is
> > the best it has ever sounded...
>
> Cool!  What sort of bandpass filters are you using (response, order)?
>
>                         ...Craig

--
 -Jim
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