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@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Wed Jul 4 00:15:02 2012
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