M-AUDIO Pro Tools Recording Studio - Manual (Page 985)

Chapter 43: Mixdown 967
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 file,
use a dither plug-in, on a Master Fader assigned
to the bounce source path. This dithers the
bounced file, before the Bounce to Disk conver-
sion truncates down to the final file resolution.
(See “Dithering” on page 960.)
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 “Use Squeezer” on page 968 for details.
16-Bit This is the Compact Disc standard bit res-
olution.
24-Bit This setting provides the highest resolu-
tion. It is useful when you want to create a final
mix without losing any resolution (for example,
if you are delivering a final mix that will be
ready to master).
To set the resolution of the bounced file:
„ Select a bit depth from the Resolution
selector.
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 968 for more information.
The following are the more common sample
rates, and their applications. 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, 003, and Digi 002).
88200 You may want to work at a sample rate of
88.2 kHz if the final delivery will be at 44.1 kHz
(such as compact disc). This will provide a
slightly faster sample rate conversion to
44.1 kHz than from 96 kHz.
If your session is 16-bit, you should still use
a dither plug-in on the output mix, because
all Pro Tools systems process audio inter-
nally at higher bit depths.