[PD] spring modeling/scanned synthesis

Alexandre Torres Porres porres at gmail.com
Wed Feb 21 02:18:24 CET 2024

Em ter., 20 de fev. de 2024 às 14:32, cyrille henry <ch at chnry.net> escreveu:

> Le 20/02/2024 à 17:10, Alexandre Torres Porres a écrit :
> >
> >
> > Em sáb., 17 de fev. de 2024 às 07:01, cyrille henry <ch at chnry.net
> <mailto:ch at chnry.net>> escreveu:
> >
> >     if you put 1 mass and 1 spring, you have a 1st order filter.
> >
> >
> > hmm, ok
> or maybe a 2nd order, since it can resonate. sorry, I'm not good at
> filters.

No worries, by the way, I really liked that [tong~] abstraction that used
[cpole~] to create a damped harmonic oscillation, I'm using that for
"spring like" signals and writing an external for it. Also by the way,
[vcf~] is based on [cpole~] so it is quite similar, but [vcf~] has a gain
compensation so the maximum gain is at 0dB.

I know a little bit about filters and will try to investigate more. I've
been avoiding physical modelling for ages and it seems its finally time to
dig in :)


> cheers
> c
> >
> >     if you put two 1st order filter one after the other, you have one
> 2nd order filter.
> >
> >
> > So this means that the information that you can have a 2nd order filter
> like Ringz from SC is not really "the same" as Spring, the comparison is
> very crude, so it seems, and I thought so...
> >
> >     scann synth was propose when a 100 masses simulation need too much
> CPU to be computed in real time at audio rate. So the shape of the string
> was only computed at data rate.
> >     if you use audio object, then it's not scanned synthesis. it's just
> PM audio simulation.
> >     So, your just mixing multiple things here, and I hardly understand
> this discussion.
> >
> >
> > hmmm, yeah, I guess they are not "properly" implementing it in SC, just
> finding a way to do it with their resources that comes as close as it is
> possible...
> >
> > Well, I'm not sure if it's worth porting SC's Spring into ELSE, they are
> not being able to say what it is useful for in their forum... but I ported
> the bouncing ball and it seems something way more fun to play with.
> >
> > Thanks
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