[PD] amplitude of modal synthesis
cyrille henry
cyrille.henry at la-kitchen.fr
Wed Apr 26 15:28:40 CEST 2006
hello,
you're right.
i made some fast clean up to this patch.
it makes a nice low pass resonant filter.
i'm wondering if it's possible to have signal based frequency and
resonant factor?
playing with block~ is the solution maybe?
Cyrille
Frank Barknecht a écrit :
> Hallo,
> frablanc hat gesagt: // frablanc wrote:
>
>
>>I've made this little abstraction (modale.pd), which is an
>>approximation of the mass-spring-damper equation, to make some
>>modal synthesis. The abstraction works fine, but the amplitude
>>of the impulsional response decreases with the frequency, and
>>so i'd like to "normalize" the output of the filter. (The
>>amplitude is really too big for low frequencies, as 100Hz ...).
>
>
> I don't have a real answer, but your patch includes lots of completely
> undefined execution orders, that might or might not be related to the
> unusual scaling. You should use manymany more trigger objects.
>
> For example this little construct in your patch:
>
> |
> [pow -1]
> |\
> | \
> [* ]
>
> has an undefined result. You must replace it with:
>
>
> [pow -1]
> |
> [t a a]
> | /
> | /
> [* ]
>
> to correctly get the square of the inverse as you probably intended
> and you must do similar triggering in the rest of your patch.
>
> Maybe this already fixes your problem.
>
> Ciao
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