Excalibur
Excalibur is an advanced mastering dynamics plugin from iZotope, Inc., designed for use in Avid Pro Tools as an AAX audio plugin. It provides multi-band dynamic processing, allowing engineers to apply frequency-selective compression and expansion during the mastering stage. The plugin is used by professional audio engineers and mastering studios working in Pro Tools to shape the harmonic balance and dynamic response of mixes across the frequency spectrum.
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1 suggestionExcalibur is an AAX plugin for Pro Tools, not a standalone application, so it cannot be updated independently. To get a native Apple Silicon build of Excalibur, you must first ensure Pro Tools itself is running the native build (version 2023.6 or newer). After that, update Excalibur through iZotope's own installer or licensing tool — typically the iZotope Product Portal or your iLok License Manager, depending on how you originally installed the plugin. Visit iZotope's support site to confirm the current update channel and to verify that Excalibur has received a native Apple Silicon build. Given that today is May 2026, you have just over two years before Apple removes Rosetta 2 in macOS 28 (September 2028), so it is prudent to confirm native availability with iZotope soon, especially if Excalibur is critical to your mastering workflow.
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