Re: Implementing a crossover with ladspa plugins?
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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). Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user