Difference between revisions of "Ladspa Plug-ins"

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(Thanks, Steve. Remove the "nothing special needed" sentence as extra detection steps for LADSPA plug-ins are needed if compiling Audacity on Linux)
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{{Introrel|1=[http://en.wikipedia.org/wiki/LADSPA LADSPA] ('''L'''inux '''A'''udio '''D'''evelopers '''S'''imple '''P'''lugin '''A'''PI) is an audio plug-in standard originally developed on Linux, but which can be ported to Windows and Mac too. Audacity has built-in support for LADSPA plug-ins.|2=|3=[[Nyquist Plug-ins]]
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{{DISPLAYTITLE:LADSPA Plug-ins}}
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{{Introrel|1=[http://en.wikipedia.org/wiki/LADSPA LADSPA] ('''L'''inux '''A'''udio '''D'''evelopers '''S'''imple '''P'''lug-in '''A'''PI) is an audio plug-in standard originally developed on Linux, but which can be ported to Windows and Mac too. Audacity has built-in support for LADSPA plug-ins.|2=|3=[[Nyquist Plug-ins]]
 
*[[VST Plug-ins]]
 
*[[VST Plug-ins]]
 
*Other pages in our [[:Category:Plug-ins|Plug-ins category]]}}
 
*Other pages in our [[:Category:Plug-ins|Plug-ins category]]}}
 
  
 
__TOC__
 
__TOC__
  
 
==Writing LADPSA plug-ins==
 
==Writing LADPSA plug-ins==
Audacity behaves as an excellent LADSPA host. Just read up about LADSPA, and make your plug-ins correctly. As a starting point, look at the [http://gdam.ffem.org/ladspa-doc/ladspa.html LADSPA developers' documentation] and the LADSPA site's [http://www.ladspa.org example plug-ins]. Keep in mind that Audacity "runs" the plug-in multiple times with some specific number of samples. So, don't assume that your plug-in will get the entire selection the first time. Here is an [http://www.it.iitb.ac.in/~chetanv/personal/acads/musicology/project/ example LADSPA plug-in] made by a user for plotting frequency variation. 
 
  
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Audacity behaves as an excellent LADSPA host. Just read up about LADSPA, and make your plug-ins correctly. As a starting point, look at some [http://www.linuxlib.ru/en/ladspa/ladspa.html LADSPA Plugin Developers' Documentation] and some [http://linux-sound.org/ladspa.html example plug-ins]. Keep in mind that Audacity "runs" the plug-in multiple times with some specific number of samples. So, don't assume that your plug-in will get the entire selection the first time.
  
==Using LADSPA plug-ins==  
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== Obtaining LADSPA plug-ins ==
===Linux===
 
It's usually most convenient to place your LADSPA plug-ins in one of the following:
 
* {{path|/usr/local/lib/ladspa}}
 
* {{path|$LIBDIR/ladspa}}
 
* {{path|$INSTALL_PREFIX/ladspa}}
 
* any colon-delimited path specified by the {{path|LADSPA_PATH}} environment variable.
 
  
In addition, LADSPA plug-ins installed using the package manager will frequently be installed in:
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* '''Windows and Mac:''' Any LADSPA plug-in compiled as a Windows .dll or Mac .dylib shared library will work on these platforms. An extensive set of "swh" plug-ins by Steve Harris is available for [http://www.fosshub.com/Audacity.html/LADSPA_plugins-win-0.4.15.exe Windows] and [http://www.fosshub.com/Audacity.html/swh-plugins-mac-0.4.15.zip Mac]. 
* {{path|/usr/lib/ladspa}}
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* '''GNU/Linux:''' The easiest and recommended method of obtaining pre-compiled LADSPA plug-ins is to install them using the download repository or package manager for your distribution of Linux. Other LADSPA plug-ins can be found online such as at http://linux-sound.org/ladspa.html. However in some cases downloading plug-ins from external sites will require you to compile the plug-ins yourself, or at least manually install them yourself.
* {{path|/usr/lib64/ladspa}}.
 
Note that if building Audacity from the source code, these paths will not be seen by Audacity unless there is some other mechanism to direct Audacity to look there, for example:
 
# Audacity is configured to install in {{path|/usr/}}
 
# {{path|/usr/lib/ladspa}} or {{path|/usr/lib64/ladspa}} are added to the {{path|LADSPA_PATH}} environment variable. (See this [http://manual.audacityteam.org/man/FAQ:Installation_and_Plug-Ins#linux_plugins Frequently Asked Question] for information regarding the {{path|LADSPA_PATH}} environment variable).
 
  
Restart Audacity and the plug-ins should be in the {{menu|Effect}} menu, underneath the divider. 
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==Using LADSPA plug-ins==  
 
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For instructions on how to load new LADSPA effects into Audacity please see [https://manual.audacityteam.org/man/effect_menu.html#add_ladspa this page] in the [https://manual.audacityteam.org/ Audacity Manual].  
If you have the ladspa-sdk installed, you can run '''listplugins''' from a terminal to list all plug-ins in your {{path|LADSPA_PATH}}.   
 
 
 
{{Hint|Advanced users on Linux can compile the latest Audacity Beta [http://audacity.sourceforge.net/community/developers#svn development code] and enable [[LV2_Support/Project_Docs|experimental support]] for [http://lv2plug.in/ LV2]. This is an extensible, "second-generation" version of LADSPA that has a wider range of effects, can use LV2 synthesizer plug-ins as powerful tone generators, and supports effect categorisation.}} <br>
 
 
 
===Windows and Mac OS===
 
Audacity also supports LADSPA plug-ins on Windows and Mac OS. Any LADSPA plug-in compiled as a Windows .dll or Mac .dylib shared library will work on these platforms. An extensive set of LADSPA plug-ins is available for [http://audacity.sourceforge.net/beta/ladspa/ladspa-0.4.15.exe Windows] and [http://ardour.org/files/releases/swh-plugins-0.4.15.dmg Mac OS X].
 
  
To add LADSPA plug-ins to Audacity, place them in the '''Plug-Ins''' folder inside the Audacity installation folder. Restart Audacity and the plug-ins should be in the {{menu|Effect}} menu, underneath the divider. The Audacity installation folder is usually under {{path|C:\Program Files}} on Windows, or under {{path|Mac Hard Disk > Applications}} on OS X.
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On GNU/Linux, if you have the ladspa-sdk installed, you can run '''listplug-ins''' from a terminal to list all plug-ins in your {{path|LADSPA_PATH}}.  
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{{Hint|LV2 is an extensible, "second-generation" version of LADSPA that has a wider range of effects and can use LV2 synthesizer plug-ins as powerful tone generators. Audacity now supports LV2 effects. For details please see [https://manual.audacityteam.org/man/effect_menu.html#LV2_effects this page] in the Manual.}}  
  
As on Linux, Audacity will also detect LADSPA plug-ins if you put them in a folder specified in the {{path|LADSPA_PATH}} environment variable. 
 
  
 
[[Category:Plug-ins]]
 
[[Category:Plug-ins]]

Latest revision as of 11:01, 26 November 2017


LADSPA (Linux Audio Developers Simple Plug-in API) is an audio plug-in standard originally developed on Linux, but which can be ported to Windows and Mac too. Audacity has built-in support for LADSPA plug-ins.
 
Related article(s):

Writing LADPSA plug-ins

Audacity behaves as an excellent LADSPA host. Just read up about LADSPA, and make your plug-ins correctly. As a starting point, look at some LADSPA Plugin Developers' Documentation and some example plug-ins. Keep in mind that Audacity "runs" the plug-in multiple times with some specific number of samples. So, don't assume that your plug-in will get the entire selection the first time.

Obtaining LADSPA plug-ins

  • Windows and Mac: Any LADSPA plug-in compiled as a Windows .dll or Mac .dylib shared library will work on these platforms. An extensive set of "swh" plug-ins by Steve Harris is available for Windows and Mac.
  • GNU/Linux: The easiest and recommended method of obtaining pre-compiled LADSPA plug-ins is to install them using the download repository or package manager for your distribution of Linux. Other LADSPA plug-ins can be found online such as at http://linux-sound.org/ladspa.html. However in some cases downloading plug-ins from external sites will require you to compile the plug-ins yourself, or at least manually install them yourself.

Using LADSPA plug-ins

For instructions on how to load new LADSPA effects into Audacity please see this page in the Audacity Manual.

On GNU/Linux, if you have the ladspa-sdk installed, you can run listplug-ins from a terminal to list all plug-ins in your LADSPA_PATH.

LV2 is an extensible, "second-generation" version of LADSPA that has a wider range of effects and can use LV2 synthesizer plug-ins as powerful tone generators. Audacity now supports LV2 effects. For details please see this page in the Manual.