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50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
9 years ago
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# Pulseaudio Dynamic Range Compression (LADSPA swh-plugins)
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Dynamic range compression (DRC) or simply compression reduces the volume of loud sounds or amplifies quiet sounds by narrowing or "compressing" an audio signal's dynamic range. Compression is commonly used in sound recording and reproduction and broadcasting[1] and on instrument amplifiers.
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Audio compression reduces loud sounds which are above a certain threshold while quiet sounds remain unaffected. The dedicated electronic hardware unit or audio software used to apply compression is called a compressor. In recorded and live music, compression parameters may be adjusted by an audio engineer to change the way the effect sounds.
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common names: audio compressor, automatic gain control, volume normalization
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* tutorial video: [Link](https://www.youtube.com/watch?v=NXE-kSrhk_w)
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* offical website: [Link](http://plugin.org.uk/)
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### install requirements
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pulseaudio
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pavucontrol
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swh-plugins # might also be called ladspa-swh-plugins
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### autostart
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sudo vim /etc/pulse/default.pa
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.ifexists module-ladspa-sink.so
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.nofail
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load-module module-ladspa-sink sink_name=compressor plugin=sc4m_1916 label=sc4m control=1,1.5,401,-30,20,5,12
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.fail
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.endif
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sudo reboot
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### references
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- http://askubuntu.com/a/44012
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- http://askubuntu.com/a/44151
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- http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#tth_sEc2.92
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- https://www.bfccomputing.com/dynamic-range-compression-for-pulseaudio/
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- https://en.wikipedia.org/wiki/Dynamic_range_compression
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### contact
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_ _ _ _
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__ _ ___ | |_| |__ | | ___| |_ _ _
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/ _` |/ _ \| __| '_ \| |/ _ \ __| | | |
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| (_| | (_) | |_| |_) | | __/ |_| |_| |
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\__, |\___/ \__|_.__/|_|\___|\__|\__,_|
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|___/
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- http://www.youtube.com/user/gotbletu
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- https://twitter.com/gotbletu
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- https://plus.google.com/+gotbletu
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- https://github.com/gotbletu
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- gotbletu@gmail.com
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