Sessions & Tracks : Importing and Exporting Session Data : Audio Conversion on Import : Sample Rate Conversion Quality

Sample Rate Conversion Quality
The Sample Rate Conversion Quality setting determines the quality of sample rate conversion used when converting and importing audio into a session. It can also applied when exporting files at different sample rate and when bouncing to disk. There are five possible settings, ranging from Low (fastest, but lowest quality) to Tweak Head (highest quality, but slowest). The higher the quality of sample rate conversion you choose, the longer Pro Tools will take to process the audio file.
The Sample Rate Conversion Quality options are available in the Import Audio, the Import Session Data, the Export Clips as Files, and the Bounce to Disk dialogs. In each case, the Sample Rate Conversion Quality setting is local to that specific dialog. The Sample Rate Conversion Quality preference only applies to conversion on import by drag and drop.
To set the sample rate conversion quality for importing audio by drag and drop:
1 Choose Setup > Preferences and click the Processing tab.
2 From the Sample Rate Conversion Quality pop-up menu, select a quality setting. For most applications, the Good or Better setting will yield very good results.
 
3 Click OK.
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The Import Audio, Import Session Data, and Bounce To Disk dialogs provide local controls for sample rate conversion quality.