I have a question about fffb~, and the Q-factor in particular. I'm building a third-octave filterbank and a whole-octave bank using fffb~.
I based my patch on the "fffb~ third-octave EQ" from the examples.
There they use a Q-factor of 0.793701, but if my math is correct (Q = f(0) / delta f), that would mean a bandwidth of 1259 Hz for the filter at 1000 Hz, which is equivalent to 1.7149 octaves.
That's a bit much for a third-octave filter isn't it?
So I'm confused! Why did the max/msp example take such a low Q (high bandwidth)? Can someone confirm that the Q-factor of 4.3185 is the one I need?
(added for convenience: the patch from the examples section)