[PD] rjdj, was : Re: [equalizer] / [lowshelf] / [highshelf] in purepd!

Frank Barknecht fbar at footils.org
Sun Mar 29 14:54:20 CEST 2009


Hallo,
volker b?hm hat gesagt: // volker b?hm wrote:

> thanks for posting this.
> for certain freqs i hear a noticeable periodic "zipping" in the sound  
> (try 230 hz e.g.).

Hm, I don't hear it, but that may be my ears.

> since the algorithm is based on the sinc function (sin(x)/x), i wonder 
> how pd handles divide by zero in the signal domain. wouldn't you have to 
> check for that in the code/patch?

A [/~] with no signal in the right inlet in Pd gives 0 as output.
In saw~.pd x never becomes zero, it's always at least 1.8955. :)

Ciao
-- 
Frank




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