formats de plugin audio:

VST :

http://en.wikipedia.org/wiki/Virtual_Studio_Technology

http://ygrabit.steinberg.de/~ygrabit/public_html/vstsdk/OnlineDoc/VST_Module_Architecture_SDK/index.html

AudioUnits

http://developer.apple.com/documentation/MusicAudio/Conceptual/AudioUnitProgrammingGuide/AudioUnitProgrammingGuide.pdf