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Subject: RE: [ModularSynthPanels] Magic Smoke Mankato VCF design

From: John Mahoney <jmahoney@...>
Date: 2007-06-13

At 01:20 PM 6/13/2007, Craig Critchley wrote:

>I think it would fit handily on 2U with standard spacing and pots if you
>didn't include an input mixer or the AC/DC switch. You'd only ever want DC
>coupling if you're filtering slow control signals, which is unusual, though
>I have once or twice wanted a CV lowpass. If you wanted to keep it you could
>put it on the edge between pots and jacks the way some of the smaller MOTM
>modules do. I'm not familiar with this filter but I presume having +/-
>outputs for all its stages is the point of it?

The point of the Mankato? There are a few!

The sound is excellent: "To hear it is to love it." :-)

In self-oscillation it provides 8 sine wave outputs at 45-degree
offsets. Quadrature times two! It will oscillate below 0.005 Hz --
that is, it's a LFO, too -- so those phase-offset sines can be used
to do crazy modulation things.

When DC-coupled, the Mankato can act as a voltage-controlled lag
(slew limiter). This is a very useful function, in fact I bought a
MOTM kit because it was the only VC Lag that I knew of (the Mankato
was unknown at that time).

Again, I'm with Magic Smoke -- not trying to hide any possible bias.

John


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