SV: Re: [sdiy] Old analog synths chladni patterns!

[karl dalen]

It was actually intended as a itsy tiny bit of a joke
if you read the begining of the chladni pages. :-)
(the chladni test was used to distinguish hand made
from serially robot made units).

However it was also sort of trick question, so how do
you do it with a synth that has no vibrating surface?
The simples solution are, you take a large coil, 
feed by a power amp, the power amp gets it signal 
from the synth, inside the coil you pour some magnetic
fluid.

You can off course use several coils if you want to.

KD

--- Magnus Danielson <cfmd at bredband.net> skrev:

> From: harrybissell at copper.net
> Subject: Re: [sdiy] Old analog synths chladni patterns! 
> Date: Wed, 9 May 2007 17:34:21 -0000
> Message-ID: <380-22007539173421521 at copper.net>
> 
> > z-plane ???   :^)
> 
> The sand will drop down into the zeros and get stuck. The learn where the
> poles are we turn the whole thing upside down and try the sand on the other
> side. This is naturally the method we use in all analysis. :P
> 
> Cheers,
> Magnus - having actually done the exercise of plotting the s-plane/z-plane
> surfaces way back in time
> 
> > H^) harry
> > 
> > >>At 04:02 PM 5/8/2007, karl dalen wrote:
> > >>>To be able to distinguish the genuinety of hand built analog synths
> > >>>the use of a pattern recognition system must be used like the:
> > >>>
> > >>>http://www.phys.unsw.edu.au/jw/chladni.html
> > >>>
> > >>>However just pouring some sand on top of the synth wont do! :-)
> > >>>
> > >>>However it could be used to visualizing filter resonance patterns.
> > >>
> > >>How?  Where's the surface? 
> > >>
> > >>_______________________________________________
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> > 
> > 
> > 
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> > 
> 



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