[LAU] Finding new good filter settings for multiband compression

Julien Claassen julien at mail.upb.de
Tue Nov 26 09:57:39 UTC 2013

Hello everyone!
   Nama has a sort of multiband compressor by using three parallel tracks, all 
processed by filters. Now we've discovered, that our current filter settings 
aren't good for multiband compression as used in a mastering setup. Yes, I 
know, people debate wether to use it or not, but it's always nice to have the 
opportunity and leave it up to the users.
   We currently use the Glame highpass, lowpass and bandpass IIR LADSPA plugins 
with unique IDs 1890-1892. The current settings are:
lowpass: 106Hz 2 stages
bandpass: 520Hz(center) 800Hz(bandwidt) 2 stages
highpass: 1030Hz 2 stages
   These settings give a good full band, but I've heard, that the bands aren't 
the best choices. I've found some reeferences to using:
160Hz as the first divider and 3500Hz for the second divider.
   could someone suggest good settings to achieve this. Either with these 
plugins or with different filters, if easily available and in form of a LADSPA 
plugin. Ecasound has LV2 support, but it's not capable of all the LV2 
   I'd also do just fine with a formula to calculate it myself, if there is 
such a thing, that really meets the audible requirements.
   Fons, last time you were kind enough to supply the settings. How did you 
arrive at these values? Did you check graphically? I'm pretty sure, that you 
wouldn't have.
   Warm regards and thanks a lot

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