Dither Plug-Ins : Dither

Dither
For more information, see the following topics:
Dither is a dither-generation plug-in that is available in AAX, TDM, and RTAS formats.
The Dither plug-in minimizes quantization artifacts when reducing the bit depth of an audio signal to 16-, 18-, or 20-bit resolution.
 
Whenever you are mixing down or bouncing to disk and your destination bit depth is lower than 24-bit, insert a dither plug-in on a Master Fader track that controls the output mix.
Using a dither plug-in on a Master Fader is preferable to an Auxiliary Input because Master Fader inserts are post-fader. As a post-fader insert, the dither plug-in can process changes in Master Fader level.
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For more information on using Dither, see the Pro Tools Reference Guide.
The Dither plug-in has user-selectable bit resolution and a noise shaping on/off option.
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If you are mixing down to an analog destination with any 24-bit capable interface, you do not need to use Dither. This allows maximum output fidelity from the 24-bit digital-to-analog convertors of the interface.