Audacity can use three types of plug-in effects:
How do you use plug-ins with Audacity?
- Plug-ins need to be put in the "Plug-ins" directory in the Audacity program folder. (For Windows, probably C:\Program Files\Audacity\Plug-Ins).
- To use VST plugins, you need the VST Enabler: http://www.audacityteam.org/vst/
On all platforms you can use "LADSPA" plugins and nyquist plugins (scripts). By default AUDACITY compiles with LADSPA support. See: http://www.ladspa.org/ and http://audacity.sourceforge.net/help/nyquist
Under Windows and Mac OS, the VST Enabler provides a LADSPA interface for VST plug-ins, so that Audacity can use them. Note that Windows VST plug-ins will only work under Windows, classic Mac OS plug-ins will only under OS 9 and previous, and Mac OS Carbon plug-ins will only work under OS X.
If you're interested in writing your own plug-ins, see "Creating your own Plug-in".