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RX Loudness Control is an audio processing plugin from iZotope that measures and adjusts audio loudness to meet broadcast, streaming and podcast standards (LUFS targets). It integrates with digital audio workstations and audio editors as an AU, VST, or AAX plugin, allowing engineers and content creators to ensure their audio meets loudness normalization requirements for platforms like YouTube, Spotify, Apple Music and broadcast television. The plugin provides real-time loudness metering and automatic gain adjustment to bring audio into compliance without manual trial-and-error.</description> <parameter name="recommendation">RX Loudness Control is an audio plugin distributed and updated through iZotope's Product Portal, not as a standalone app. To get a native Apple Silicon build (if one is available), open iZotope's Product Portal installer on your Mac and check for updates there — that is the correct channel for all iZotope plugins including RX Loudness Control. iZotope has been shipping native Apple Silicon builds of its audio plugins since RX 9 and Ozone 10 (released in 2021), so if you have a current iZotope installation, the native version should already be available through the Product Portal. If you are running an older version of RX that was installed under Rosetta, updating through the iZotope Product Portal will pull the native build automatically. Be aware that your host DAW (Pro Tools, Logic Pro, Ableton Live, etc.) must also be running a native Apple Silicon build for the plugin to run natively — a native plugin loaded into an Intel-only host still runs through Rosetta emulation.