[sdiy] Old analog synths chladni patterns!

Ian Fritz ijfritz at comcast.net
Wed May 9 00:16:40 CEST 2007

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:
>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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