> The tanh~.pd is working swell. Are you using mine? why not just use [expr~ tanh($v1)]?
for the cheby filter, you'd need to know where are all the poles and zeros, then you could do it with vanilla raw filters or maybe even a few biquad~ in cascade 2015-07-03 11:55 GMT-03:00 Pagano, Patrick <p...@digitalworlds.ufl.edu>: > The tanh~.pd is working swell. > Would you all be able to suggest a replacement for the lp8_cheb~? I needed > to replace three non-vanilla items > 1.) tanh~ > 2.) make symbol [zexy] > 3.) lp8_cheb~ > > I am trying to convert an algorithmic patch by a gentleman named Scott > Norlund and these are the only problems from a rather couple patch. > > Also, is there a work-around for "inits"? > Thank you all very much for the wonderful help > > Sent from my iPhone > > On Jul 3, 2015, at 2:44 AM, i go bananas <hard....@gmail.com> wrote: > > yes, you need to use a [clip~ -3 3] to restrict the input. But the > function converges to +0.999999 and -0.999999 or whatever by then anyway, > so for all practical purposes it is fine. > > On Fri, Jul 3, 2015 at 2:26 PM, Miller Puckette <m...@ucsd.edu> wrote: > >> I've never seen that approximation before but there must be some >> restriction on the allowable values of X since the expression diverges >> for large positive or negative values of x, while tanh(x) converges to >> +1 nad -1, respectively. >> >> cheers >> Miller >> On Fri, Jul 03, 2015 at 01:23:29PM +0900, i go bananas wrote: >> > there's a good approximation for tanh that can be made using just a >> couple >> > of simple arithmetic objects: >> > >> > formula is: tanh(x) ~= x*(27+x*x) / (27+9*x*x) >> > >> > it's close enough for every application i've ever come across, it's >> cheap >> > cos it only uses simple arithmetic, and it doesn't degrade the >> resolution >> > of your signal like a table lookup does. >> > >> > >> > >> > On Fri, Jul 3, 2015 at 12:56 PM, Chris McCormick <ch...@mccormick.cx> >> wrote: >> > >> > > On 03/07/15 03:06, Pagano, Patrick wrote: >> > > > Is there a way i can replace something for tanh~ >> > > > and inits in Vanilla 46? >> > > >> > > Using a pre-computed table for speed: >> > > >> > > https://github.com/chr15m/blockhead/blob/master/e_tanh.pd >> > > https://github.com/chr15m/blockhead/blob/master/e_tanh-help.pd >> > > >> > > Or install "blockhead" using deken. :) >> > > >> > > Cheers, >> > > >> > > Chris. >> > > >> > > -- >> > > http://mccormick.cx/ >> > > >> > > _______________________________________________ >> > > Pd-list@lists.iem.at mailing list >> > > UNSUBSCRIBE and account-management -> >> > > http://lists.puredata.info/listinfo/pd-list >> > > >> >> >> > _______________________________________________ >> > Pd-list@lists.iem.at mailing list >> > UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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