a few of patches of mine that describe the behaviour of vanilla and some extended filters
2015-01-29 23:39 GMT-02:00 Alexandre Torres Porres <[email protected]>: > it's how the filters were designed, they're not perfect throughout the > spectrum > > you'll need to use/build other filters for that purpose of working with > that higher portion of the spectrum (in which I can hardly still hear, by > the way)/ > > cheers > > 2015-01-29 20:28 GMT-02:00 Gilberto Agostinho < > [email protected]>: > > Hello all, >> >> An user reported a bug in the forum about some problematic behaviours of >> certain filters in pd-extended 0.43.4, particularly [hip~] and [bp~]. I >> found this bug to be also present in pd vanilla 0.46.5. Basically, these >> filters do not respond to frequencies higher than approximately 12 kHz, in >> contrast to [vcf~] which responds to any frequency. This can be very >> clearly observed in the case of [bp~] using a narrow band frequency sweep. >> >> Here is a video showing the problem: http://youtu.be/A7mPhiHcmhc >> Here is the topic in our forum where this discussion started: >> http://forum.pdpatchrepo.info/topic/8967/highpass-hip-not- >> working-as-expected/18 >> Here is that user's bug report concerning pd-extended: >> https://sourceforge.net/p/pure-data/bugs/1187/ >> Finally, here is the patch I am using to test this (I am using >> [spectrogram~] (which in its turn needs [metrum] and [multiplex~], all of >> which are included in this compacted file): https://www.dropbox.com/s/ >> fcwciwe8klwh5xz/filter-test.zip?dl=0 >> >> NOTE: the user that reported the bug argues that pd vanilla 0.45.4 does >> not produce any problems, but I firmly believe this to be a mistake of him. >> I tested these filters in both 0.45.4 and 0.46.5 and both produce the same >> behaviour. I tried to contact him to ask for further tests (he was not >> using my patch above for his own tests), but so far I got no reply. Also, >> other users confirmed this bug to be present in both vanilla and extended. >> >> Please let me know if I can be of any help with this. >> >> Best, >> Gilberto Agostinho >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> http://lists.puredata.info/ >> listinfo/pd-list >> > >
5.[vcf~]Passa.Banda.pd
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5.[vcf~].pd
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8.[biquad~].pd
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