User`s guide

Chapter 25: Working with QuickTime Movies 377
7 Select the resolution for your movie
audio. Red Book audio CDs are always 16-
bit, while many multimedia presentations
and CD-ROMs use 8-bit resolution. You
cannot create a QuickTime movie with 24-
bit audio; audio from 24-bit sessions is con-
verted to 16-bit or 8-bit audio, depending
on what you choose.
8 If you intend to convert your session to
8-bit resolution for use in multimedia, use
the Squeezer option (click the Convert af-
ter Bounce option, then the Settings but-
ton to access this feature) to improve the
fidelity of the converted 8-bit audio. This
option uses a proprietary DSP algorithm
that preprocesses the audio using compres-
sion, limiting and gating before converting
to 8-bit resolution. We recommend this op-
tion for optimal results.
9 Select the Sample Rate for your movie
audio (click the Convert after Bounce op-
tion, then the Settings button to access this
parameter). The default audio sample rate
is 44100 (44.1kHz) which is the standard
sample rate for audio CDs. Multimedia pre-
sentations and CD-ROMs may use a sample
rate of 11025 (11.025kHz) or 22050
(22.050kHz).
10 Click Bounce, name the new movie,
and choose where to save it.
11 The audio tracks are converted to the se-
lected sample rate and bit resolution, and a
new flattened movie is created incorporat-
ing the audio. You can open and play the
flattened movie in any software applica-
tion that supports QuickTime.
✽ Pro Tools sample rate and bit resolution
conversions use large amounts of processing
power. Save time by selecting a lower sample
rate conversion quality in the Editing Prefer-
ences.