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Activity Forums Apple Final Cut Pro Custom Audio Metering Plugin loading issue

  • Custom Audio Metering Plugin loading issue

    Posted by Hugo de la Cerda on March 10, 2026 at 8:57 pm

    Hi, I’m looking for an Apple expert in Final cut pro that can help me with my plugin.

    I created an audio metering plugin that works in all other platforms (Protools, Media Composer, Resolve, Logic, Nuendo, etc…) But for some undefined reason refuses to load in Final Cut Pro.
    there is no log that shows what is the problem.
    My plugin passes all ‘auval -strict’ tests with flying colors. (AU VALIDATION SUCCEEDED)
    I thought it may have been FCP’s sand boxing environment and since my plugin needs network access (it uses UDP transport to send the audio meter data to a satellite device)
    but removing all networking didn’t make it load, same for signing/entitlements/hardening runtime/notarizing. Nothing, no error, just this on loading FCP: “While verifying Audio Unit compatibility, Final Cut Pro encountered 1 Audio Unit plug-in which did not pass the Apple AU validation. These plug-ins have been excluded from further usage in Final Cut Pro to prevent possible problems or crashes.”
    I also adjusted and limited AudioChannelLayouts to make it just stereo, nothing.

    I’m hoping there’s an apple developer or someone who has been through this before who can help me out.

    Thank you!

    Ben Balser replied 2 months ago 2 Members · 1 Reply
  • 1 Reply
  • Ben Balser

    March 11, 2026 at 2:16 am

    I hate to say this, but you may have better luck posting on the Apple FCP user forum. There’s a couple of higher end technical guys there who could probably help.

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