[PD] 3rd octave band pass filters at low mid frequencies

Matthias Blau blau_m at web.de
Mon Oct 18 16:53:37 CEST 2004


Hi list,

does anyone know how to implement IEC 1260 compliant 3rd octave band 
pass filters in pd, notably at mid frequencies below 250Hz (assuming a 
sampling frequency of 44100Hz)?

I understand that the standard way of doing this is to downsample the 
signal and to use filters with a corresponding higher mid frequency,
for which one can find biquad realizations.

Any ideas?





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