freq. mult.

[Martin Czech]

if you already synthesize the master frequency, you may be better off with
additional osc. and soft sync (or no sync).
I remember a 4 note chord module with 4 vcos and a switching network to create
 7 m7 d7 chords.
 
Now, my idea of electronic music is a bit different, I'd say wasted hardware for
an outdated concept of music.

btw.: I didn't say  yesterday that plls won't track. I just wanted to "damp" a
perhaps to optimistic vision of such a system.

btw.2.: the 4046 circuit should be second order (it is).
There are more complicated pll concepts arround, I guess higher order.
But I didn't tale a look at them so far. Any experiences out there?


m.c.

:::Date: Tue, 28 Nov 2000 13:10:54
:::From: Scott Gravenhorst <music.maker at gte.net>
:::To: synth-diy at node12b53.a2000.nl
:::Subject: Re: freq. mult.
:::X-Mail-Agent: RedStarWare SMTP Emailer v0.03
:::X-MDaemon-Deliver-To: synth-diy at node12b53.a2000.nl
:::
:::<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!!!
:::