[sdiy] Modeling circuits

[cheater cheater]

<semantics>
Scott, I think you're not actually talking about component level
modeling, just about "physical modeling" of circuits. or
component-based modeling, I.e. you take a circuit (or large block) and
find the (differential) equations that describe its behavior as a
whole and then you run that using newton-raphson or something like
that. I think component-level modeling would mean having separate
equations for every component, including separate sources of
self-noise, separate thermal characteristics, and possibly separate
device features as well (because of tolerances). I think this is what
Jason has touched upon in his email. Semantics, but I think it
explains :-)
</semantics>

Cheers,
D.

On 23/10/2010, Jason Proctor <jason at redfish.net> wrote:
> really? do you have a source for this information?
>
> i ask because of a post by Paul Schreiber a little while back which
> describes how component level modelling isn't viable with current
> processor technology.
>
> the interview with UAD in Tape Op also didn't mention this -- IIRC, that
> is...
>
>
>
>>State of the art modeling such as Universal Audio uses, and probably
>>line6, actually painstakingly models the electrical behavior of
>>every circuit element (transistors resistors, tubes etc) on the
>>original circuit board and runs that model on one or more dsp chips,
>>which is why they need a lot of horsepower.
>>
>>Sent from my iPhone
>>
>>On Oct 22, 2010, at 8:21 AM, "Barry Klein" <barryklein at cox.net> wrote:
>>
>>>  Hi,
>>>  Just received an ad from Line6 on their "HD modeling" pedals.
>>>  Made me wonder...  What if you had one that took your crappy old
>>>sawtooth and made it
>>>  a nice fat/phat Moog one....  you get the idea.  Do these types of
>>>circuits apply different amounts
>>>  and/or frequency eq based on the input character or are they fixed
>>>and you get what you get?
>>>
>>>  Barry
>>>
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