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Hello all,<br>
<br>
Recently I wrote a message here and in pd's mailing list about some
possible bugs involving the filters [hip~] and [bp~]. As it turns
out, those were not bugs but rather limitations of the algorithms
themselves (the discussion in pd's mailing list can be found here:
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/pd-list@lists.iem.at/msg02169.html">https://www.mail-archive.com/pd-list@lists.iem.at/msg02169.html</a> )<br>
<br>
The filter [bp~] cannot be used for frequencies higher than 12 kHz,
which in the end is not much of a big deal in most cases (and in
those cases, there is always [vcf~] to solve it since it does not
show this limitation). But the problems with [hip~] cannot be that
easily ignored: it does not output -3 dB at the cutoff frequency as
expected. But another high pass filter included in pd, [iemlib/hp1~],
does this perfectly well and also has no limitation for higher
frequencies.<br>
<br>
So here is the thing: we do have this perfectly good high pass
filter that is slightly more hidden than what most people consider
to be the "default" HP filter (virtually all tutorials and books
about Pd use [hip~], and I guess the majority of users are very
likely to be using it only). So why not make [hp1~] the default
filter itself? That is, replace [hip~] for [hp1~].<br>
<br>
I know this is not very orthodox, it may break someone's patch if
that patch depends on this inconsistency of the original [hip~] and
when opening a patch in pd vanilla or extended you would be welcomed
with the original [hip~], but in the end it would make pd-l2ork
better in my opinion. <br>
<br>
Best,<br>
Gilberto<br>
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