[PD] [ggee/notch] / [ggee/bandpass] seem to work at default/fixed samplerate of 44100

[Alexandros Drymonitis]

Isn't this the way to do it?
x->x_rate = sys_getsr();

On Sun, May 3, 2015 at 6:32 AM, Peter P. <peterparker at fastmail.com> wrote:

> * Raphaël Ilias <phae.ilias at gmail.com> [2015-05-02 16:36]:
> > Hello,
> >
> > I was testing the [bandpass] and [notch] object's from "ggee" library,
> > which compute coefficients values for vanilla's [biquad~] and discovered
> > that the center frequency wasn't the one expected, but was shifted
> > something like 10%.
> >
> > After a few measurement I found that the real center frequency was around
> > 1.08841 upwards the ferquency value set to [bandpass] or to [notch]
> > inlets...
> >
> > ...and I later realized that 48000/44100 = 1.088435... and that on my
> > computer, pd is working at 48000 Hz.
> > So, apparently these objects are calculating the coefficients with an
> > supposed samplerate of 44100 Hz.
>
> You are right. I just looked at the source file for one of these
> objects, and it contains a line
>
> x->x_rate = 44100.0;
>
> So apparently the sample rate for it is hard-coded. I don't know ir
> Günther is actively monitoring the pd-list, but perhaps someone else
> here might know how to get that code to be more responsive to different
> sampling rates...
> (you could change your sampling rate to 44100 in the meantime though,
> Raphaël)
> best, P
>
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