User Manual

Pro Tools Reference Guide964
AudioSuite Dither Some AudioSuite plug-ins can
automatically apply dither when processing.
You can select this option in the Processing Pref-
erences page.
The Use AudioSuite Dither option enables a pre-
set, noise-shaped dither for the following Digi-
Rack AudioSuite plug-ins:
•Gain
• Normalize
•Smack!
•Sonic NoNOISE
Dither in Fades and Crossfades In the Fades dia-
log (Edit > Fades > Create), the Use AudioSuite
Dither option enables a preset, noise-shaped
dither.
Dither on Export and Import When you export
audio to a lower bit depth, or when you import
an audio file into a session that is at a lower bit
depth than the file, a preset, noise-shaped dither
is applied.
Dithered Mixer Plug-Ins (Pro Tools HD Only) Avid
has developed a mixer that provides all of the
benefits of the standard Stereo Mixer and Sur-
round Mixer plug-ins, but also provides uncorre-
lated dither on any summed output. There are
two Mixer plug-ins that feature dither with
noise shaping: Stereo Dithered Mixer and Sur-
round Dithered Mixer.
Noise Shaping
Noise shaping can further improve audio perfor-
mance and reduce perceived noise inherent in
dithered audio. Noise shaping uses filtering to
shift noise away from frequencies in the middle
of the audio spectrum (around 4 kHz), where
the human ear is most sensitive.
Noise Shaping is available in the DigiRack
Dither and POW-r Dither plug-ins.
For more information on AudioSuite Dither,
see the Audio Plug-Ins Guide.
For more information on using the Dither in
fades and crossfades, see “Use Dither” on
page 602.
For more information about the application
of dither on export, see “Exporting Audio”
on page 334.
For more information about the application
of dither on import, see “Bit Depth Conver-
sion and Dithering” on page 323.
For more information on using the Dithered
Mixer plug-ins, see the Pro Tools|HD
User Guide.
For more information on using Noise Shaping,
see the Audio Plug-Ins Guide.