[sdiy] Old analog synths chladni patterns!

[Magnus Danielson]

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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