[PD] GGEE [lowpass] error vs. purepd [lowpass]? was Re: basic resonant filters in Pd

[brandon zeeb]

Btw, this seems to be a feature of almost all of the GGEE biquad coefficient
externals.  Check line 67 on highpass.c, bandpass.c, equalizer.c, and so
forth.  I'm not sure how you would want to handle this, but keep in mind
it's systemic.

Cheers,
~Brandon

On Mon, May 18, 2009 at 4:30 PM, Hans-Christoph Steiner <hans at at.or.at>wrote:

>
> On May 18, 2009, at 4:27 PM, Claude Heiland-Allen wrote:
>
>  brandon zeeb wrote:
>>
>>> GGEE's [lowpass] seems to be sharp by a semitone or so
>>>
>>
>> [1] line 68:     x->x_rate = 44100.0;
>>
>> seems to have a hardcoded sample rate, which obviously causes problems
>> when running at other sample rates...
>>
>
> Nice catch.  That seems like a bug, no?  As far as I know Günter is
> missing-in-action on his code in the pure-data SVN, so it seems appropriate
> to me IMHO to commit fixes directly.
>
> .hc
>
>
>>
>>
>> Claude
>>
>> [1]
>> http://pure-data.svn.sourceforge.net/viewvc/pure-data/trunk/externals/ggee/filters/lowpass.c?view=markup
>>
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>
>
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