16 Apr
2013
16 Apr
'13
8:22 a.m.
On Tue, April 16, 2013 8:42 am, Federico Lopez wrote:
Hi,
In my work as Front of House sound engineer I am searching for a good
set to tools to run an audio crossover all in linux, I would like to
hear from your experience in that field and will be glad to hear
comments for this attempt.
Heres is my approach:
For a flexible crossover do you need: crossover filters, delay for
outputs (to align components), multiple zone handling, filters for EQ,
allpass filters to deal with phase, limiters to protect the speakers.
Here are some suggest apps :
Crossover Filters
zita-lrx (Fons Adriaensen) Command line crossover with Linkwitz–Riley
and Butterworth filters, gain and delay for each band, up to 16 chanels,
but you can run various instances to make complex zones.
Filters
You can make your own standalone filters with FAUST, online examples
include second order bandpass, lowcut.
Bandpass filters of LADSPA in JackRack
Allpass filters:
4x4 pole allpass filter, In conjunction with JackRack can be used to fix
Phase response.
Limiters:
zita-dpl1 (Fons Adriaensen) Look-ahead digital peak limiter.
My goal is to finish this post:
http://opensourcefoh.meteor.com/posts/qJjYCPJwQohgPutt4
We have expose some additional outputs in Jamin recently which you might
find useful for FOH. But there is a delay in the processing so, probably
not good for live sound. YMMV.
There is future worked planned for Jamin if/when the current gtk3 version
has received some more testing/feedback. That will add a new ui
specifically for FOH with multiple user defined speaker systems among
other feature requests.
You might also like eq10q : http://sourceforge.net/projects/eq10q/?source=dlp
Some people are using it as an xover for live sound already.
--
Patrick Shirkey
Boost Hardware Ltd