SV: Re: [sdiy] Analog Modeling, with a computer!

[karl dalen]

--- Harry Bissell Jr <harrybissell at prodigy.net> skrev:

> --- Antti Huovilainen <ajhuovil at cc.hut.fi> wrote:
> 
> 
> > This is a mistake "newbies" often make. Modelling
> > individual components 
> > does not make sense. Instead you need to identify
> > the relevant 
> > non-idealities and model the whole circuit such that
> > it matches those. A 
> > capacitor alone does not do anything. However once
> > you connect two 
> > resistors and diodes to the capacitor, you have an
> > AD envelope generator 
> > and can model that (typically modelling attack and
> > decay stages 
> > separately).
> 
> 
> I'd disagree (in part). Modeling a capacitor or
> resistor is unlikely to result in any change in
> sound..unless that component was AWFUL  (the parasitic
> elements are very large).
> 
> Modeling the semiconductors WOULD make a large
> difference and a better model would be noticible.

Agree, simulate all components, no mercy, walk the pirates plank!!

> Simple models give simple results, and don't include
> the small changes that might make a circuit sound
> different.

> I have seen some interesting results in spice that
> didn't sound good when built, and some that look
> boring on screen that sound very good.
> 
> I cannot imagine anyone running spice in real time,

Exactly what i was going to say, imagine a "one" op amp
model, prefeably from one of semiconductor manufactures 
"own" spice program ,now add 10 or even 100 for a complete
analog synt!! I can imagine that spice simluating computer
chocking "before" pressing the simulate button!

No i dont use SPICE, altought i should, but im lazy!

KD