Specifications

Pro Tools Reference Guide170
172.4 kHz and 192 kHz Each of these sample rates
are four times the standard sample rates for CD au-
dio and DVD audio respectively. Audio files re-
corded at higher sample rates take up more drive
space, but provide higher resolution for time-based
plug-in processing (which can help avoid aliasing).
The 176.4 kHz and 192 kHz sample rate options
are only available if you are running Pro Tools
with audio hardware that supports these sample
rates.
Mixed Audio File Formats
Pro Tools supports mixed audio file formats (such
as WAV and AIF) in a single session. When im-
porting audio files into a Pro Tools session, you
can choose to
Add them rather than Convert them
regardless of the audio file format.
You can change the audio file format for all newly
recorded or imported (and converted) files in a ses-
sion by selecting a different
Audio Format option
in the Session Setup window.
To change the Audio Format for the Pro Tools
session:
1 Choose Setup > Session.
2 In the Session Setup window, select an audio
file format (AIF or WAV) from the
Audio For-
mat
selector.
Interleaved Multichannel
Versus Multi-Mono Audio
Files
For stereo and greater-than-stereo multichannel
audio, Pro Tools supports both interleaved
multichannel audio files and multi-mono audio
files.
An interleaved audio file contains all channel in-
formation, stored in an alternating single audio
“stream.” Interleaving distributes and “inter-
leaves” the consecutive bits of data. This helps
protect against consecutive errors when the data is
read back.
Multi-mono, or “split-mono” multi-channel audio
files are separate mono audio files that are treated
together as a multichannel group of audio files.
This lets you each channel (file) independently.
For example, with stereo files, two separate files
are created, where one file contains the left chan-
nel, and the other file contains the right channel.
The files are identified by the suffixes of “.L” and
“.R”. The two files are linked, and are edited as a
pair in stereo tracks in Pro Tools. However, you
can decouple them and split them to individual
mono audio tracks in Pro Tools so that the can be
edited, processed, and mixed independently.
You can change the
Interleaved setting for the cur-
rently open session in the Session Setup window.
When this option is enabled, all newly recorded or
imported (and converted) stereo or greater-than-
stereo multichannel files in the session will be in-
terleaved audio files.
To enable (or disable) interleaved audio files for
the Pro Tools session:
1 Choose Setup > Session.
2 In the Session Setup window, select (or dese-
lect) the
Interleaved option.