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Editorial Team
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Asked: 2026-05-23T10:25:46+00:00

This is probably a question better suited for the proposed Audio Programming Q&A site,

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This is probably a question better suited for the proposed Audio Programming Q&A site, but it’s still a proposal, so good ol’ SO will have to do for now.

It’s my understanding that:

  1. The Audio Unit standard, unlike VST, does not support plugins that generate MIDI as output.
  2. Logic (as in the industry-standard DAW for OSX) has no native support for VSTs. VST support is provided by AU wrapper plugins, such as FXpansion.

Do these together imply that one cannot have a plugin in Logic that generates MIDI data? It seems impossible, but after 20 minutes of Googling it and reading message board complaints, it appears it might very well be the case.

Or perhaps there is something outside of the AU framework?

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  1. Editorial Team

    It definitely seems to be possible. Check out this thread on the CoreAudio mailing list, along with this post from one of the CoreAudio team members on the implemented property.

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