[PD] convolution filter

Ben Saylor bensaylor at fastmail.fm
Fri Feb 4 02:49:00 CET 2005

You might be interested in my partconv~ external:



On Wednesday 02 February 2005 07:52 pm, Roman Haefeli wrote:
> hi
> i tried to create a convolution filter (if this is the correct
> expression for what i want), but i failed. i want to filter an
> audiosignal with an impulse response (e.g. of a room) or the transfer
> function of a loudspeaker.
> i read the docu  about 'fft and pd' from marius schebella
> (http://www.parasitaere-kapazitaeten.net/Pd/fft_und_pd_en.htm) and i
> tried the patch from page 5. when i use an impulse response, where
> the first sample is 1 and the rest is 0, it works, which means that
> the output of the convolution filter is the same as the input. but
> when i change the position of the sample with value 1, i get bad
> glitches in the sound. the same, when i use any other impulse
> responses than the (dummy) one i described first.
> i also tried the patch from page 10 (convolution filter) which is the
> same as the pd-doc -> 4.fft-examples -> 08.convobros.pd. but this one
> seems to work more as a vocoder than like what i want.
> if somebody understands what i want and i am trying to explain -->
> hints or links are very welcome. also if somebody have already made a
> patch to generate reverberation with room impulse responses by
> convolution, i am very interested.
> cheers
> roman
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