On Tue, Jul 3, 2012 at 11:41 AM, S. Massy <lists@xxxxxxxxxxxx> wrote: > Hello, all, > Here's a question for the fine DSP and accoustic experts on this list. I > need to apply different processing (mostly reverb and compression) to > different bandwidths of the frequency spectrum on a given track. How > would I go about using filters to implement crossovers as flat as > possible? Most plugins do not actually seem to tell what their rolloff > curve is. > Thanks. > Cheers, > s.M. Your choices are limited by the bandwidth and center frequencies you choose. When you choose the quality factor to get a certain phase/magnitude characteristic, that determines your bandwidth:cutoff freq ratio for resonant filters. I would defer to more experienced members on the list--but I think your best choice is to use 2nd order low-pass/high-pass pairs with Q=0.5. That will get you a reasonable (but not perfect) reconstruction and nice flat response. To get perfect reconstruction--with the limitation of 1-octave band filters--you can use wavelets and their associated mirror quadrature filters. Chuck _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
