Sessions & Tracks : DigiBase : Waveforms

Waveforms
For more information, see the following topics:
The Waveform column displays waveforms for audio files. Waveform display depends on the following:
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Waveforms are displayed if they have already been calculated and stored, either with the file metadata or in the global Waveform cache.
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When a file is imported into a session, a waveform is automatically calculated for it.
 
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Waveforms are gray if they have not been stored with the file metadata or in the global Waveform cache.
The waveform overview is stored in the file, or in the Pro Tools Databases folder on your system drive. For more information, see WaveCache.
Summed Waveforms for Multichannel Files
Waveform displays for stereo and multichannel files are summed.