# Mono/Mono AU fails to load in Live, "This Audio Unit plug-in is not compatible. Failed to initialize."

**URL:** <https://forum.juce.com/t/mono-mono-au-fails-to-load-in-live-this-audio-unit-plug-in-is-not-compatible-failed-to-initialize/34318>\
**Category:** Audio Plugins\
**Created:** [July 10, 2019, 10:40pm UTC](https://forum.juce.com/t/mono-mono-au-fails-to-load-in-live-this-audio-unit-plug-in-is-not-compatible-failed-to-initialize/34318 "2019-07-10T22:40:53Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![apple412](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/apple412/32/6788_2.png) [@apple412](https://forum.juce.com/u/apple412)\
**Post date:** [July 11, 2019, 7:44pm UTC](https://forum.juce.com/t/mono-mono-au-fails-to-load-in-live-this-audio-unit-plug-in-is-not-compatible-failed-to-initialize/34318/3 "2019-07-11T19:44:01Z")

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This does seem to fix it!

A couple notes to future visitors:

If you are attempting to make a “mono only” plugin, I believe the following options are necessary in AppConfig.h:  
#define JucePlugin\_PreferredChannelConfigurations {1, 1}, {0, 0}, {0, 1}, {1, 0}

The 0’s are necessary because the VST3 validator (if you’re running it) disables the master bus. See related topic here:

> [@VST3 Validator Error](https://forum.juce.com/t/vst3-validator-error/21438/2):
>
> Any news for this issue?

That’s all. Hopefully this helps someone in the future!

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