try google, 11000 results ; )

basically it's a delay based method for emulating a plucked string.
usually white noise is used with a short delay and a feedback loop. the delay time is
analogues to pitch.

--- In Doepfer_a100@yahoogroups.com , "spleensick" <spleensick@y...> wrote:
> Hello, everybody!
>
> I think it's wonderful that an analog (or digital for that matter)
> delay module is being discussed. As I don't know much about
> construction of delays, I didn't know there were technical issues in
> constructing a module like this.
>
> Does anybody know how the Blacet Time Machine is constructed Or the
> old Moogerfooger delay I think BOSS has some old half-racked delay
> with CV-in as well...
>
> Anyway, why not create several delay modules It's such an
> interesting effect anyway. One for longer delays and one for ultra-
> short delays for physical modelling and what not. By the way, is
> there any good resources where I can read more about this Karpluss-
> Strong stuff It seems really interesting.
>
> And for a delaymodule with longer delaytimes I have some more
> suggestions which I would like to see. For example, a switch were you
> could select between infinite echo, degenerating echo and also a pre-
> destined number of taps. In the last case it would be extremely cool
> to have individual CV-control for each of the tap's frequency and
> amplitude. And also maybe several audio-outputs to route each
> individual tap to. That would be wonderful! There are tons of
> possibilities...
>
> And finally a direct question to Dieter... Is there a possibility
> that we may see a delay module anytime soon Ingo (I think it was)
> said something about a digital delay module being planned How are
> those plans developing What kind of features would such a module
> have
>
> And by the way, that VoSim stuff seems really intersting as well. I
> just love exotic synthesis methods! Are there audio examples anywhere
>
> // Fredrik