freq. mult.

[Scott Gravenhorst]

<possibly silly mode>
Hmm.  I'm conguring up an image of a 'synth-cordian', a 
device that uses a PLL to track a mono VCO and pop it's
output up around 1 megahertz, this driving a TOG which
is connected to a zillion buttons that select notes
to mix into chords...  You play the VCO with one hand
and the chord buttons with the other.  Heh, well at
least you wouldn't have to pump it; or use the pumping
action as a controller for portamento/VCF.  Polka?
</possibly silly mode>

WeAreAs1 at aol.com wrote:
>
>In a message dated 11/28/00 7:25:27 AM, blacet at monitor.net writes:
>
><< The standard method of using a PLL such as a 4046 and a binary counter
>works well if you get the filter right. See "The CMOS Cookbook" by Don
>Lancaster. >>
>
>This has got me thinking...  Do you guys remember the old EML "Poly Box"?  It 
>had a little one-octave keyboard and an input for a monophonic VCO, and it 
>would allow you to play polyphonic chords that you could then send to your 
>monophonic synth's VCF and VCA.  Obviously, it had some kind of top-octave 
>divider in it.  But what I would like to know is:  Did it require the input 
>of a very high frequency VCO (in order to put the top-octave divider's output 
>in a useful octave range), or did it have some kind of frequency multiplier 
>(PLL?) inside that allowed you to keep your monosynth VCO in a more "normal" 
>octave range?  Have any of you guys ever owned or looked inside one of those 
>Poly Boxes?
>
>Michael Bacich

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