Specifications
Chapter 29: Mixdown 489
Pro Tools also lets you create multichannel in-
terleaved files of any supported file type. This
can simplify file management of mixes and
projects for backup and archiving.
Pro Tools does not support interleaved files na-
tively. This means that they must be split into
multi-mono files on import (requiring addi-
tional disk space).
Resolution
This option lets you select between three differ-
ent bit resolutions for the bounce conversion.
Bounce to Disk does not apply dither when con-
verting during or after a bounce to a lower reso-
lution (including when bouncing to 16-bit).
When you need to create a lower resolution
bounce file, use a Digidesign Dither plug-in, or
similar, on a Master Fader assigned to the
bounce source path. This dithers the bounce
file, before the Bounce to Disk conversion trun-
cates bits into the final file resolution. (See
“Dither and Bounce to Disk” on page 480.)
Resolution choices include the following:
8-bit This resolution is often used in multimedia
applications. If the material you are working
with is relatively simple, you can use the
Pro Tools “Squeezer” feature for optimal results.
See “Sample Rate Conversion Quality Option”
on page 490 for details.
16-bit This is the Compact Disc standard bit res-
olution.
24-bit If you plan to use the bounced file with a
Pro Tools TDM system, you can take advantage
of the greater resolution and headroom afforded
by this higher bit rate.
To set the bounce file resolution:
■ Select a bit depth from the Resolution Selec-
tor.
Sample Rate
This option lets you save to any of several sam-
ple rates. Choices are dependent on your
Pro Tools system and Digidesign audio inter-
faces.
Sample Rate Conversion Quality
If you choose a sample rate that differs from the
original sample rate of the session, the conver-
sion options become available. You can config-
ure the conversion quality, and schedule con-
version to occur during, or after, the bounce. See
“Sample Rate Conversion Quality Option” on
page 490 for more information.
The following are the more common sample
rates, and their application. Higher sampling
rates will provide better audio fidelity for record-
ing and playback, and also for processing with
dynamics, dither (with noise shaping), and ana-
log emulation plug-ins.
192000 This is a supported sample rate for some
audio DVDs, and provides the highest quality
audio fidelity with compatible audio interfaces
(such as the 192 I/O).
176400 You may want to work at a sample rate
of 176.4 kHz if the final delivery will be at
44.1 kHz (such as compact disc). This will pro-
vide a slightly faster sample rate conversion to
44.1 kHz than from 192 kHz.
96000 This is a supported sample rate for DVD
audio and provides high-quality audio fidelity
with compatible audio interfaces (such as the
192 I/O, 96 I/O, 96i I/O, and Digi 002).