"Those bypass fiters" oops, meant "Those bandpass filters"
2014-04-09 9:59 GMT-03:00 Alexandre Torres Porres <por...@gmail.com>: > Hi, that is the way I'm pointing to. I know of those but it's a bit more > complicated than that. Those bypass fiters have zero values of -1 and 1, > while [bp~] has only pole values. So my question is if I can achieve [bp~] > by only turning the zero values of -1 and 1 to 0. I actually tried it and > it didn't seem to do the trick. > > Maybe I'm doing something wrong. I don't know. It'd solve my issue if I > could have [bp~] as biquad coefficients. But if not, I'd need some > guidelines on how to plot the frequency response in the same way as > [filterview] or [mmb.filterplot] plot the biquad coefficients. > > Cheers > > > 2014-04-09 8:30 GMT-03:00 Colet Patrice <colet.patr...@free.fr>: > > Le 09/04/2014 01:45, Alexandre Torres Porres a écrit : >> >> Hi there. I'm trying to find a way to plot the frequency response >> of [bp~]. >> >> >> Hello, I don't know if it helps, in ggee there are filter objects that >> are applying formula for biquad coefficients, it's easy to use those >> formula in expr and apply them to biquad object in vanilla. >> >> I know of patches that can plot from biquad coefficients, so it'd be >> great if I could get biquad coefficients from an input of frequency and Q. >> >> I see [bp~] is a 2 pole filter. So does it mean I can achieve it by >> zeroing out a bandpass filter made with [biquad~]? Cause I see people make >> bandpass filters with 2poles in biquad, but the zeros are at -1 and 1. I >> tried zero values of zero, but it didn't look to good to make me believe >> that's the same as [bp~]. >> >> I know of miller's example H10.measurement.pd, and compared to it, >> didn't seem to fit. >> >> Anyway, I wanted something that would plot [bp~] right away, not like >> the H10 example, which takes some time. But then, if we can't do it with >> biquad coefficients, I would need some guidelines to do it some other how. >> >> Thanks >> >> Cheers >> >> I know about filterview and patch >> >> >> _______________________________________________pd-l...@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> >> >
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