These should be the coefficients for implementing hip~ with rpole~ and rzero~
Fc - cutoff frequency Fs - sampling frequency a = 1 - (Fc * 2 * pi / Fs) // 0 <= a <= 1 b = (a + 1) / 2 w[n] = x[n] + a[n] * w[n-1] y[n] = b[n] * (w[n] - x[n-1]) On 19 February 2016 at 10:34, Dario Sanfilippo <sanfilippo.da...@gmail.com> wrote: > Thank you so much for your answer, Joe and Alexandre. > > You're right, Joe. I was actually referring to hip~ when talking about the > impulse response, indeed hip~ is one-pole and one-zero. It might be good to > specify it in the help file. > > What formula would you use for the coefficients of rpole~ and rzero~ to > implement it? > > Cheers, > Dario > > > > On 18 February 2016 at 20:27, Alexandre Torres Porres <por...@gmail.com> > wrote: > >> let me share some patches too. >> >> as said: lop~ is not the same as rpole~ but is possible to be implemented >> using rpole~, hip~ can be implemented with rpole~ and rzero~ >> >> my patches show the difference equations and all, they're in portuguese, >> and part of my computer music class examples available here >> <https://sites.google.com/site/porres/Live%20Electronics%20%28EL%20Locus%20Solus%29%20-%20Porres.zip?attredirects=0&d=1> >> >> cheers >> >> 2016-02-18 14:32 GMT-02:00 Joe White <white.j...@gmail.com>: >> >>> Hey Dario, >>> >>> [lop~] can be implemented with just an [rpole~], did you make sure to >>> set the coefficients correctly? I've attached an example patch to implement >>> [lop~]. >>> >>> [hip~] is an [rpole~] and [rzero~] in series. You can find the >>> coefficients in the source code. >>> >>> Cheers, >>> Joe >>> >>> On 18 February 2016 at 14:59, Dario Sanfilippo < >>> sanfilippo.da...@gmail.com> wrote: >>> >>>> Hello, list. >>>> >>>> Do you know what the difference equations of [lop~] and [hip~] are? >>>> >>>> Just hoping that one of you has a quick answer, otherwise I'll try >>>> figuring it out by looking at the code. >>>> >>>> Anyway, they don't seem to be the same as [rpole~] as the impulse >>>> response is different. >>>> >>>> Thanks, >>>> Dario >>>> >>>> _______________________________________________ >>>> 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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