3 Jul
2012
3 Jul
'12
10:12 p.m.
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:
Thanks, Fons, very helpful as
usual.
Cheers,
S.M.
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).