# VST3 Midi In/Out problematic

**URL:** https://forum.juce.com/t/vst3-midi-in-out-problematic/18166
**Category:** Audio Plugins
**Created:** [June 19, 2016, 9:15pm UTC](https://forum.juce.com/t/vst3-midi-in-out-problematic/18166 "2016-06-19T21:15:28Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![yfede](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/yfede/32/506_2.png) [@yfede](https://forum.juce.com/u/yfede)
#### Post date: [June 20, 2016, 4:29pm UTC](https://forum.juce.com/t/vst3-midi-in-out-problematic/18166/4 "2016-06-20T16:29:47Z")

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You may check this thread for further discussion of this… peculiarity of VST3 😒 :

> [@What is the intention of macro JUCE VST3 EMULATE MIDI CC WITH PARAMETERS](https://forum.juce.com/t/what-is-the-intention-of-macro-juce-vst3-emulate-midi-cc-with-parameters/17858/):
>
> My doubt about the meaning of the JUCE\_VST3\_EMULATE\_MIDI\_CC\_WITH\_PARAMETERS macro is which “direction” it applies to: when enabled, does it mean that… a) Every CC received by the plug-in as MIDI input, will be interpreted as if the corresponding automated parameter were moved by the host, and the plug-in setParameter() is called accordingly or b) That for every automated parameter that is moved (i.e. every call to setParameter()) a corresponding CC is sent from the plug-in as MIDI output ? P…

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