On Fri, 27 Feb 2004, Tim Blechmann wrote:
hi all,
i'm currently using biquad filters (i'm getting the settings from iemlib's lowpass, highpass (...) externals). i consider to change my patch to use svf~ from the cyclone library.
does anyone know, which algorithm is more expensive in terms of cpu time? and are there any mayor differences in the characteristics of these two filter types?
I think they are completely different. Biquad~ at least is not really good if you want to control in the signal domain. The lowpass etc externals implement the filters from here:
http://www.harmony-central.com/Computer/Programming/Audio-EQ-Cookbook.txt written by Robert Bristow-Johnson
Then the last time I saw them they were written by me, and not part of the iemlib, but how knows, ... in reality the hard work was done by Robert Bristow-Johnson.
Guenter