[sdiy] Old analog synths chladni patterns!

[Ian Fritz]

At 01:49 PM 5/9/2007, Mattias Rickardsson wrote:
>On 09/05/07, Mason <masond at gmail.com> wrote:
>>On 5/9/07, Magnus Danielson <cfmd at bredband.net> wrote:
>> > From: harrybissell at copper.net
>> >
>> > > z-plane ???   :^)
>> >
>> > The sand will drop down into the zeros and get stuck.
>> > Magnus - having actually done the exercise of plotting the 
>> s-plane/z-plane surfaces way back in time
>>
>>But did you plot them with sand? That's the question.
>
>Must be tricky. With a digital synth, though, you could do these
>'granular synthesis' exercises if you model the whole synth as AND
>gates in the S-plane, so-called SAND gates... ;-P
>
>A bit more serously, Ian was right with his questions:
>"How? Where's the surface?"
>The signal from a synthesizer is just a one-dimensional value as a
>function of time, not a vibrating surface. And the vibrating surface
>of the violin is a vibrating surface, not a sound, and definitely not
>a one-dimensional value as a function of time. Some of the vibrations
>make sound in the whole room, some doesn't. And almost all the sound
>from the violin is made by something else than this particular
>surface.

Yeah, plus all that they use laser interferometers these days, not sand.  :-)