Using RX Loudness Control within Avid Media Composer | Loudness Plugin

RX Loudness Control works as an offline process within Avid Media Composer to make your completed mix broadcast compliant. It also allows you to import your new broadcast-compliant file into your timeline, so you can create your final render of both the audio and video together.

Because loudness standards assess audio levels across an entire program, RX Loudness Control operates as an offline, AudioSuite process. This way, it can analyze your audio exactly as the loudness standards specify. This means RX Loudness Control will not appear in your list of AAX or RTAS real-time insert plug-ins.

Create an audio mixdown

To create an Audio Mixdown of the final program audio, first set the in and out points for your entire program, and ensure all your audio tracks are selected. Then select “Audio Mixdown>To Sequence” from the Special menu.


Select your preferred output settings for mono, stereo, or surround from the window prompt. Your completed Audio Mixdown should appear as a new audio master clip in your project bin.


Select “AudioSuite” from the Tools men to open the AudioSuite window. Drag the mixdown file from your bin onto the AudioSuite window. Then select “iZotope RX Loudness Control” from the plug-in selection menu.


Click the purple plug button to bring up the RX Loudness Control window, where you can access all the necessary controls. Presets will easily make your audio compliant with any of the international loudness standards.


Correct your audio

Press the Optional button to analyze the current loudness values for your mix. Once the region has been analyzed, it will display the current level and loudness statistics. Values within compliance will be represented in green, while non-compliant values will be red. (You can also view these statistics on a graph by clicking on the History tab.)

Next, click the Loudness Standards list to select a preset for the desired loudness standard.


This will set the True Peak and integrated loudness values appropriate for the broadcast standard you chose, so you don’t need to modify any settings. Short-Term settings are only required for some of the standards; the preset will automatically engage and set this parameter if necessary.

Confirm and deliver

Chose the appropriate loudness settings, then click OK to process. RX Loudness Control will apply the necessary DSP to correct your mix for the loudness compliance standard you selected, or your adjusted settings. When the processing is complete, a newly compliant file will appear in your bin.


You can also generate a .CSV loudness report file of the complete statistics for your audio by clicking on the Export arrow visible just below the iZotope logo. Some networks require these reports along with the delivery of your final project.


Drag the corrected audio from your bin and into an empty track in your project, making sure to sync it up with the video. With this new compliant audio in your project, you’ll now want to solo this track or mute all the other audio tracks to ensure your final render includes only the compliant audio.

Now you’re ready to render the video for final delivery!

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