Hi all

Well, I have discorer 4 months ago liquidsoap, and I am very happy with 
this powerful and smart software.

Meanwhile I am learning about LS and caml language, I was tried a lot of 
tweaking to improve sound processing in my no-gui centos server.
I was tried all the LS own filters, like high-pass, low-pass, iir, etc. 
But making a big process use a lot of cpu resources.
Better one is to use all PADSPA plugins that LS can handle! and use a 
little power of cpu.

Look at http://ardour.eu/plugins or http://www.ladspa.org to know more 
about ladspa and plugins. Install through your package management system 
all the plugins you want, or compile those that your OS not have. One 
case is the calf multiband processor. Centos not have this package in 
repository, so I was compiled the latest calf plugin from the git 
repository.

Here you have a 4 band compressor, with the settings I have using. You 
may need to tweak to your requirements.

radio = ladspa.multibandcompressor(
bypass=false,
input=1.,
output=1.,
split_1_2=130.,
split_2_3=1500.,
split_3_4=7000.,
s1=-0.25,
s2=-0.136,
s3=-0.148,
q1=0.90,
q2=0.90,
q3=0.90,

threshold_1=0.211,
ratio_1=2.5,
attack_1=4.,
release_1=400.,
makeup_1=1.2,
knee_1=1.,
detection_1=1,
bypass_1=false,
mute_1=false,

threshold_2=0.300,
ratio_2=2.5,
attack_2=10.,
release_2=150.,
makeup_2=1.1,
knee_2=3.,
detection_2=1,
bypass_2=false,
mute_2=false,

threshold_3=0.260,
ratio_3=2.5,
attack_3=100.,
release_3=200.,
makeup_3=1.1,
knee_3=2.75,
detection_3=1,
bypass_3=false,
mute_3=false,

threshold_4=0.145,
ratio_4=2.5,
attack_4=57.,
release_4=200.,
makeup_4=1.2,
knee_4=2.,
detection_4=1,
bypass_4=false,
mute_4=false,

radio
)


Of course, you have a tons of plugins to made and creat effects or audio 
processing. If you want to preset prior to put in your LS script, you 
can use an audio software to run in your PC and add the plugin, and then 
copy the settings in you LS script. because I have a XP workstation, I 
am using Aqualung to implement the ladspa plugins in window$: 
http://aqualung.factorial.hu

Please share your experience with ladspa plugins in LS.

Regards
Normando

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