freq. mult.

[Hairy Harry]

Now lets be fair to old technology...

I remember when I saw my first Prophet V. I looked at
the front panel and told the salesman... yeah... big deal
what does it do that all the other synths don't do...

He answered "it plays five notes simultaneously..."

A chord box that you can add to a monosynth, in its day
was a major move forward...

But why not just use a VCO set to a very high range to
start with... no PLL... ?

And you got some problem with the polka ???

H^)  harry



>From: Scott Gravenhorst <music.maker at gte.net>
>Reply-To: music.maker at gte.net
>To: synth-diy at node12b53.a2000.nl
>Subject: Re: freq. mult.
>Date: Tue, 28 Nov 2000 13:10:54
>
><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
>
>-- Scott Gravenhorst : On The Edge, but the Edge of What?
>-- Linux Rex, Linux Vobiscum  |  RedWebMail by RedStarWare
>-- FatMan: www.teklab.com/~chordman
>-- NonFatMan: members.xoom.com/_XMCM/chordman/index.html
>-- The 21st century does NOT start in the year 2000!!!
>
>

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