[pd-ot] electric circuits in software

[Mathieu Bouchard]

On Sat, 29 Apr 2006, Chris McCormick wrote:
> On Fri, Apr 28, 2006 at 08:53:21PM -0400, Mathieu Bouchard wrote:
> > On Thu, 27 Apr 2006, Miguel Ramos wrote:
> > 
> > > Never forget that if you put an analog square wave on one end of a long
> > > cable, on the other end what you will receive won't be a square wave,
> > > but a rounded version of it. Moreover, a squarewave is a digital concept
> > > mainly. There's really no way to do it in analog.
> > This is the cause of the limited "bitrate" of analog cables that I mention
> > in the previous mail.
> I would say it's more due to the resistance, impedance, capacitance of
> each individual wire that has a filtering effect on an electrical signal
> that moves through it.

That's the same thing, really. Capacitor effects and coil effects act as 
lowpass/highpass filters (though I never really recall which is which). 
Lowpass-filtering of a squarewave makes the Gibbs phenomenon appear: a 
wavy pattern appears at each discontinuity.

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| Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju
| Freelance Digital Arts Engineer, Montréal QC Canada