Re: Audio Crossover in Linux

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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
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