[PD] attack/release for spectral gate [was: is this a spectral gate?]

Kevin McCoy km.takewithyou at gmail.com
Fri Mar 30 04:07:44 CEST 2007


Your approach is really sensible and what I was originally seeking to
do, but it's difficult in Pd without the help of a few externals I
imagine.  [vectral~] has ended up working just fine and may open some
doors into other strange manipulations :)

Thanks for being willing to share your info - it is much appreciated!
Really I was just trying to sort of emulate some of the functionality
of your plug so I could use something like it in Pd; on OS X there's
no VST support at the moment.  If I release an abstraction I will most
certainly give you credit for ideas and inspiration (and Frank
Barknecht too since he turned me on to FFT with his excellent tutorial
and started this patch).

Also, your plugins are visually just fantastic - maybe when Pd's gui
advances a little bit more we will be able to enjoy the hypnotic
dancing lines too.


On 3/29/07, Tom Erbe <tre at music.ucsd.edu> wrote:
> sorry for the delayed reply - i'm a bit behind on the pd-list...
> in my plug, i keep a table of gain factors for each fft band. before
> each fft, i update the gain factors by multiplying by an attack
> multiplier if we are below the threshold or by a release multiplier
> if above the threshold. after that, each gain factor is limited, so
> it doesn't go past the gate gain setting after attack, or past 1.0
> after release.
> this recalcing of the gain table only happens once per fft...
> the attack multiplier and release multiplier are recalculated based
> on both time and the gate gain setting.
> On Mar 29, 2007, at 10:56 AM, Kevin McCoy wrote:
> >>>> Of
> >>>> course, Tom Erbe's soundhack filters already do this, but he hasn't
> >>>> responded to this on how he got attack/release to work for him - it
> >>>> may need to be handled differently in Pd as opposed to whatever he
> >>>> used to code those VSTs.
> - - - - -
> tom erbe ~ tre at ucsd.edu ~ studio director - computer music ~ ucsd
> department of music



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