Re: [LAU] Implementing a crossover with ladspa plugins?

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