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Re: [korgpolyex] S&H random modulation generation.

2010-01-05 by Atom Smasher

On Tue, 5 Jan 2010, Russ wrote:

> Isn't this why a lot of random number generators are called quasi 
> random? I know on my Moog MG1 if I pull up the random modulation and 
> lopass it just right at certain speeds it is definitely a repeating 
> pattern.  I have read elsewhere that the random mod is a S&H circuit.
=================

i'm not familiar with that synth in particular, but having a fast wave 
sampled by a slow wave is a "random" LFO design that i recall from 555 
timer cookbooks, and similar circuit design tutorials.

these things are sometimes called "quasi random" (or similar) because 
that's what they are. true random, in any engineering sense, is hard to 
implement. and bob moog was more of an engineer than anything else.


> (my aoplogies for bringing up a synth other than the Poly 800, both my 
> polys get used a lot even with a moog and a DX in the studio). I still 
> plan on getting one of the hawk mods off of you Mike, I have just had a 
> roller coaster of a year.
==============

i don't think anyone here expects you to use only one synth ;)

mike and i have certainly mentioned other synths. it's where we steal 
ideas^H^H^H^H^H^H^H^H^H^H get inspiration from. you won't loose points 
just for that.


> 2010 looks to be better already though. I already fixed a DX27, a 
> realtube preamp andI discovered a stash of vacuum tubes I forgot I had. 
> Found some nice RCA 12ax7's that I cannot believe were just sitting 
> there!
================

i'm with ya on 2010 looking better... already... ;)


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