Sessions & Tracks : Importing and Exporting Session Data : Exporting Pro Tools Tracks as AAF or OMF Sequences : Exporting Clip Gain

Exporting Clip Gain
When exporting to AAF with the Enforce Avid Compatibility option on, Pro Tools generates Media Composer-style clip gain data, based on the clip gain data on each track.
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To export clip-based gain data, the Enforce Avid Compatibility option must be enabled.
The clip gain of Pro Tools clips with static volume between -inf dB and +12 dB will translate directly to clip-based gain upon export. Dynamic clip gain and values above 12 dB will be rendered for each clip in the resulting media, to optimize compatibility with Avid video editing applications.
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Exporting Volume Automation to OMF
Pro Tools does export volume automation to OMF, but only if the Enforce Avid Compatibility option is disabled.