DigiDesign Pro Tools 8.0 Reference Manual page 1038

Example of Auto Match Pull Factors
The Auto Match Pull Factors option links audio
and video pull factors when changing session
frame rate.
For example, assume a Pro Tools session is set to
a frame rate of 25 fps, the audio and video are
both playing with no pull ups, and Auto Match
Pull Factors is enabled.
If you then change the session Frame Rate to
24 fps, both the Audio and Video Rate Pull set-
tings would change by –4.0% (the appropriate
pull setting required by the change in frame
rate).
Auto Match-enabled pull factors are applied to
any existing Audio Rate Pull Up/Down or Video
Rate Pull Up/Down settings.
Table 48. Sample Rates at Pull Up and Pull Down Settings
Pull Up/Down
+4.1667%
and +0.1%
+4.1667%
+4.1667%
and –0.1%
+0.1%
–0.1%
–4.0% and
+0.1%
–4.0%
–4.0% and
–0.1%
1020 Pro Tools Reference Guide
44100 48000
45983 50050
45938 50000
45892 49950
44144 48048
44056 47952
42378 46126
42336 46080
42294 46034
For example, if audio was already being pulled
–0.1% when you changed the session Frame
Rate from 29.97 to 24 fps, then the Audio Rate
Pull Up/Down menu would switch to None.
Audio Sample Rate Pull Up and
Down
The Audio Rate Pull Up/Down setting applies pull
up or down factors to session audio record and
playback. All pull rates are available, regardless
of session frame rate.
See also "Auto Match Pull Factors" on
page 1019.
Audio Rates and Pull Up/Down Options
Table 48 lists actual sample rates of each pull up
and pull down option and combination
(rounded to the nearest whole Hz):
Sample Rate
88200 96000
91967 100100
91875 100000
91783 99900
88288 96096
88112 95904
84757 92252
84672 92160
84587 92068
176400 192000
n/a n/a
n/a n/a
n/a n/a
176576 192192
176224 191808
n/a n/a
n/a n/a
n/a n/a