On Thu, Dec 20, 2001 at 09:12:34 +0200, Jussi Laako wrote: > Alexander Ehlert wrote: > > > > That should be way faster than FFT. Using FFT your frequency bands > > are distributed linear over the frequency range. That is untypical > > for equalizers anyway, as they always use a logarithmic scale. Which > > is obvious, because musical harmonies are perceived on a logarithmic > > scale, f.i. one octave up corresponds to a doubling in frequency. > > Yes, this part is the most problematic. I'm still tuning my response > generation algorithm for the FFT based eq.
My mbeq is FFT based too. I just used the ISO EQ bands (or an approximation) and interpolated between them to the the amplitudes at each bin. There is also a variation on the FFT which has logarithmically spaced bins though, but I didn't think I really needed it. - Steve
