freq. mult.

[Scott Gravenhorst]

harrybissell at prodigy.net wrote:
>Now lets be fair to old technology...

I *did* turned on "possibly silly mode"...

>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... ?

Ummm...  Not as much fun?

>
>And you got some problem with the polka ???

Only if it's not the "Beer Barrell"

>H^)  harry
>

But seriously, I have a couple of MK50240 ICs, but I'm not
sure about operating freq.  If the range is too limited, 
pitch sweeps wouldn't be much fun.  I keep thinking about
those 50240s sittin' around in the drawer...

>
>>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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-- 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!!!