freq. mult.

[Scott Gravenhorst]

harrybissell at prodigy.net wrote:
>If I remember the Mostek chips clocked at 2mhz for top octave...
>but top octave is about 8KHz... You could  clock at 500KHz and still
>get 2KHz fundamental....

And then one could use 12 PLLs, one on each output to double,
triple, quad the freq...  See, there might just be a need 
for a PLL somewhere in there.  (c;  So the TOG is used as a BOG.

>Did you see the DX synth on E-bay with the accordian chord
>keyboard??? Its so... you???
>
>H^) harry
>
>
>>From: Scott Gravenhorst <music.maker at gte.net>
>>Reply-To: music.maker at gte.net
>>To: harrybissell at prodigy.net, synth-diy at node12b53.a2000.nl
>>Subject: Re: freq. mult.
>>Date: Tue, 28 Nov 2000 14:35:15
>>
>>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!!!
>>
>>
>
>_____________________________________________________________________________________
>Get more from the Web.  FREE MSN Explorer download : http://explorer.msn.com
>

-- 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!!!