On Tue, Jul 03, 2012 at 08:00:21PM +0000, Fons Adriaensen wrote: > On Tue, Jul 03, 2012 at 12:41:58PM -0400, S. Massy 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. > > * The outputs of first order xover filters will add to exactly the > input signal. But you only have 6 dB/oct and hat may or may not > be enough, depending on the application. > > * If you want steeper (higher order) filters one solution is to > us the Linkwitz-Riley type. Outputs add to a perfectly flat > frequency response, but the phase response of the recombined > signal is not linear. It won't matter in most cases. > > For ready-to-use L-R filters, get zita-lrx1. It provides up to > four bands using 4th order filters (i.e. 24 dB/oct). Thanks, Fons, very helpful as usual. Cheers, S.M. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
