10.6

Table Of Contents
564Logic Pro User Guide
What to do if an Audio Units plug-in isn’t working
Apple works with third-party developers to ensure that their Audio Units plug-ins are
fully compatible with Logic Pro. Most Audio Units you install on your computer should not
require anything other than installation—and if they are copy protected, authorization—to
function properly. However, you may install Audio Units that do not appear in the plug-in
submenus or work as expected. When this happens in Logic Pro, try one or more of the
following:
Check the vendor or developers documentation to ensure you have properly authorized
the Audio Units plug-in to run on your computer.
Follow the vendor or developers documentation to re-install the Audio Units plug-in.
Open the Plug-in Manager and verify that the Audio Units plug-in is enabled. If it is
disabled, you can re-scan and/or activate the Audio Units plug-in. Be careful, however,
as activating an Audio Units plug-in that does not pass Audio Units validation risks
crashing your system. See Use the Plug-in Manager in Logic Pro for more information.
Contact the third party developer or vendor for assistance. Be sure to tell them which
version of macOS and Logic Pro you are using so that they can better assist you.
Support for ARA 2 plug-ins in Logic Pro
Celemony provides an extension of the Audio Units plug-in standard called Audio Random
Access (ARA). The ARA extension enables a host application and compatible plug-in to
share song structure information (for example, regions and their associated audio files)
and analysis results (including transients and pitch information). Logic Pro supports ARA
2-compatible plug-ins, including Melodyne.
Using a compatible plug-in in ARA mode provides several benefits to enhance your
workflow. First, you no longer need to capture audio before working in the plug-in. Second,
your edits are preserved when you move or copy the audio region to another track, as long
as the plug-in is inserted in ARA mode in the first Audio Effect. In addition, your edits to
the audio material are preserved when you copy the project.
When you insert a plug-in in ARA mode on an audio track, Flex is disabled. Also, the
Compare button is not available in the plug-in window. Before you begin working, you start
playback momentarily to transfer song information and all relevant audio analysis results
to the plug-in. You can start editing in the plug-in immediately after the information is
transferred. If you move, copy, or edit regions on the track, the updated information is
transferred the next time you start playback.
Use an ARA 2-compatible plug-in on an audio track
1. In Logic Pro, in the first Audio Effect on an audio channel strip, choose Audio Units >
Celemony > [plug-in name] (ARA).
ARA mode is available only in the first Audio Effect on an audio track.
2. After the plug-in window opens, start playback.
3. Edit the audio material in the plug-in window.
You can use an ARA 2-compatible plug-in as part of selection-based processing. For more
information about ARA, refer to the manufacturers documentation.