hplus at mindcontrol.org
Fri Nov 23 13:01:13 EST 2001
> >Yes, it's typically cheapest done as N parallel bandpass filters with
> >adjustable gain and very carefully tuned crossover points.
> Surely not. I would have thought it would be better to use 20 parametric
> eq's (bell filters) in series.
I was thinking 2x10 (for stereo).
Putting 10 filters in series runs the quite significant risk that any
inadequacy in the filter design (and there will be inadequacies) can
multiply 10-fold, so I'm not so sure that series is "better".
Also, my claim was for "cheaper". You can clearly run 20 filters in
5 iterations (using SSE) or 10 iterations (using 3DNow!) when you run
them in parallel. Not so when you run them in series.
I think this subject, too, should go in the FAQ :-)
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