Is it possible to create plugins for Logic that generate MIDI?

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 readin开发者_如何学编程g 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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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.