Unable to start Mastering Assistant

When I click Mastering on my Stereo Out, it does nothing and stays greyed out. When I select Mastering Assistant from the Mix menu, it also does nothing. Is anyone else experiencing this frustration and/or find a solution?

MacBook Pro 15″, macOS 13.6

Posted on Nov 7, 2023 9:17 AM

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Posted on Nov 7, 2023 12:29 PM

I have a 2017 15" 2.9Hz i7 MBP.


I did figure out that if you remove all other plugins from Stereo Out, then Mastering Assistant will then become available. In the support article it shows a screenshot utilizing a compressor just before Mastering Assistant, but removing all of that is the only solution I've found for making it work.

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Nov 7, 2023 12:29 PM in response to Iaamusic

I have a 2017 15" 2.9Hz i7 MBP.


I did figure out that if you remove all other plugins from Stereo Out, then Mastering Assistant will then become available. In the support article it shows a screenshot utilizing a compressor just before Mastering Assistant, but removing all of that is the only solution I've found for making it work.

Jan 2, 2024 5:43 AM in response to travisham

Since the Mastering Assistant needs to control the output, no, you can't put anything there before using it. It needs to apply units based on its analysis of your work. You can do tweak it all afterwards. So, you can master the piece yourself manually and be done, or you can use Mastering Assistant FIRST and then tweak afterwards, but not really do both in that manner.

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Unable to start Mastering Assistant

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