User`s guide

Chapter 25: Working with QuickTime Movies 375
Sample Rate Conversion
Quality
If you import QuickTime audio that was
not originally recorded at your session’s
current sample rate, the sample rate is con-
verted to match the audio to your session.
Pro Tools allows you to choose the quality
of the sample rate conversion via the Con-
version Quality parameter in the Editing
Preferences. The higher the quality of sam-
ple rate conversion that you choose, the
longer it takes to perform the sample rate
conversion.
The five conversion settings range from
“Low” to “Tweak-head.” The Low setting
provides results that are considerably better
than the Macintosh’s built-in sample rate
conversion. For most applications, the Bet-
ter setting will yield excellent results.
Because the Best and Tweak-head settings
take significantly longer than the others,
we recommend that you use these only in
cases where the highest fidelity is abso-
lutely essential and you have a consider-
able amount of time. The Tweak-head set-
ting in particular can take several hours to
perform sample rate conversion on moder-
ate-length files.
To set the sample rate conversion quality:
1 Choose Setups > Preferences and click Ed-
iting.
2 Click the Conversion Quality pop-up
menu and choose the desired setting.
Importing Audio from a
QuickTime Movie
This procedure allows you to use the Im-
port Audio From Current Movie and Im-
port Audio From Other Movie commands
to import audio tracks either from a Quick-
Time movie currently imported into your
session or from other QuickTime movies
on your hard disk. You can also use the Im-
port Audio From Other Movie command to
import audio files of a different bit resolu-
tion or sample rate into your session.
To import audio tracks from a QuickTime
movie:
1 If you wish to import audio from a
QuickTime movie that is already in your
session, choose Movie > Import Audio
From Current Movie.
– or –
2 If you wish to import audio from a
QuickTime movie that is not imported into
your session, choose Movie > Import Audio
From Other Movie. Select the QuickTime
movie from which you wish to import
audio. The Track Import dialog appears,
listing information about the audio tracks.
Track Import Window showing audio tracks in a
QuickTime movie