Specifications

Pro Tools|HD Getting Started Guide98
Plug-in Features
Standard Surround and Stereo Mixers
Both the Surround and Stereo Mixer plug-ins
provide the following:
• 24-bit digital output, from an audio inter-
face output or Bounce to Disk. Mix level
scaling stores 48-bit results, using a 56-bit
accumulator for maximum precision.
• 48 dB of mix headroom.
• Output clip indication.
• Multichannel mixing formats for surround
(Surround Mixer only).
Surround Dithered and Stereo Dithered
Mixers
Both the Surround Dithered and Stereo Dithered
Mixer plug-ins provide the following:
• The same features as the standard
Pro Tools|HD Stereo and Surround mixers, with
the addition of non-correlated dither to any out-
put or bus send.
Switching Mixer Plug-ins
To switch TDM Mixer plug-ins:
1 Quit Pro Tools.
2 Do one of the following:
• On Windows systems, open the “Plug-ins
(Unused)” folder (Program Files\
Common Files\Digidesign\DAE).
– or –
• On Mac systems, open the “Plug-ins (Un-
used)” folder on your Startup drive
(Library/Application Support/Digidesign).
3 Locate the Mixer plug-in that you want to use,
and drag it to the Plug-ins folder.
4 Open the “Plug-ins” folder, locate the Mixer
plug-in version that you no longer want to use,
and drag it to the “Plug-ins (Unused)” folder.
5 Launch Pro Tools.
Mixer Usage Guidelines
The following conditions apply to mixing with
Pro Tools|HD systems.
 One DSP chip is automatically dedicated to
mixing in the TDM environment.
 As you reach the basic mixer limits for a single
DSP chip, the system will automatically begin
allocating DSP resources from another chip (if
available), making it unavailable for plug-ins.
 Each bus or send connection requires DSP to
mix signals. This means that each send or Aux-
iliary Input that you create will require DSP
power to mix the results.
When using Dolby Digital encoders or
Dolby E, you can only use the non-dithered
mixer. The Dithered mixer will not allow
proper playout of Dolby Digital or Dolby E
out of an output.