freq. mult.

[Grant Richter]

It would lock C to the frequency of the VCO. Then you could play chords.

> From: WeAreAs1 at aol.com
> Reply-To: owner-synth-diy at node12b53.a2000.nl
> Date: Tue, 28 Nov 2000 15:02:40 EST
> To: blacet at monitor.net, synth-diy at node12b53.a2000.nl
> Subject: Re: freq. mult.
> 
> 
> 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
>