Doepfer

--- In Doepfer_a100@yahoogroups.com, "Roel Steverink" 
> Is the principle for the source of uncertainty coming
> from the chaos theory? But what a minute, was the chaos
> theory already in existence when Buchla build it's modules?
> 

I'm not sure the Buchla Source of Uncertainty
was ever associated with Chaos, however, the
Blacet Dark Star Chaos module might be.  

Ethan

Hi Ethan, Roel,

> > Is the principle for the source of uncertainty coming
> > from the chaos theory? But what a minute, was the chaos
> > theory already in existence when Buchla build it's modules?
> > 
> 
> I'm not sure the Buchla Source of Uncertainty
> was ever associated with Chaos, however, the
> Blacet Dark Star Chaos module might be.  

I wondered this about the Dark Star Chaos myself, so when Blacet 
announced they had a load of the hard-to-get chips at its core, I 
bought one (just the PCB and chip). Haven't built it yet, but from 
the schematic and the chip datasheet, the answer is no, the DSC is 
not associated with what I would regard as 'chaos', i.e. non-linear 
dynamics, Chua's oscillator and the like. However, whether it might 
*sound* like a chaotic oscillator remains to be seen (I doubt it 
though - I did breadboard a Duffing oscillator a while ago, and 
it 'shreiked' rather than 'hissed' noisly!). Basically the DSC is 
voltage-controlled digital noise (like A117), with built in env gen, 
filter, VCA and oscillator.

When I get the time, one of the things I intend doing is to build a 
Chua oscillator, stick a voltage-controlled resistor in it, and see 
what comes out (and if it sounds reasonable, then stick a phase 
comparator and VCO into the mix to see if it can be made to track a 
VCO, PLL style, so that one might be able to play tunes with it...)

Tim

From:  "ethanzer0 <ethanzer0@y...>" <ethanzer0@y...> 
Date:  Fri Dec 27, 2002  2:30 pm

Subject:  Re: chaos module

Hi Ethan,

I followed your lead. Great pic! On the Buchla and associates 
site, under history you can find short descriptions 
of modules from system 100 and 200. And sometimes pics, such
as the source of uncertainty. But so small, you can't
destinguish anything??? 
On your pointed out site, they can't have done better, ahum
only...those terrible jumps in the picture are making me
wild if I look to long at them! 

I'm very in favour Doepfer developping this chaos module.
Yes, I have voted in the poll, of course. And yes it's on
my want list, I definately will buy one. 

I'm wondering. What will the difference in sound be compared
too the A-126?

Looking at the complexity of this module, me again, 
can this be done with in the price range that we normally
expect from Doepfer. And what will it be. 
In the range of the A-111 and A-126? 

Is the principle for the source of uncertainty coming
from the chaos theory? But what a minute, was the chaos
theory already in existence when Buchla build it's modules?

Roel.




Ethan wrote: 

There are two version of the Buchla
S.O.U. The 265 and the 266. The 266
being the more complex of the two. 
Check here for info and schematics:

http://www.musicsynthesizer.com/Buchla/source_of_uncertainty.htm

Enjoy!

Ethan