freq. mult.

[Hairy Harry]

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....

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!!!
>
>

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