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VST 3 - AudioUnit v2 Wrapper

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Helper Class wrapping a VST 3 plug-in to an Audio Unit v2 plug-in.

The VST 3 SDK comes with an AudioUnit wrapper, which can wrap one VST 3 audio processor and edit controller as an AudioUnit effect/instrument.

The wrapper is a small dynamic library which loads the VST 3 plug-in. As AudioUnits store important information in their resource fork, this library must be compiled for every VST 3 plug-in.

How does it work?

  • You first need to build the SDK (check here) and then you should have the xcode project.
  • You may need to download the CoreAudio SDK from Apple and point cmake to it when building the SDK with it (see here).
  • Create a copy of the again AU wrapper example project directory (public.sdk/source/vst/auwrapper/again/)
  • Rename the copy to your needs
  • Edit the target settings of the project and change
    • Product Name
    • Library search path so that it points to the directory where libauwrapper.a exists
    • architecture setting so that it only includes architectures that the VST 3 plug-in supports
  • Search in the project for AUWRAPPER_CHANGE and change the settings to your needs, especially in:
    • Edit audiounitconfig.h, see comments there
    • Edit Info.plist, see comments there
  • Edit the "Make Links Script" for easier debugging/development
  • Build your project
  • Done ... that is all!

For the release version, you must place a copy or an alias of your VST 3 plug-in in the resource folder of the bundle named "plugin.vst3"