User guide

259
Problems, possible causes, and solutions
A/V synchronization is poor when playing back from the
Timeline
Possible cause 1 Non-compatible sound card You may be using a non-
compatible sound card.
Solution Use only compatible sound cards For an updated list of
compatible sound cards, see the RT.X Support section of
our web site at www.matrox.com/videoweb/support.
Possible cause 2 Audio Capture Drift Detection test not run The first
time you try to perform an analog capture in Adobe
Premiere, you’re prompted to run the Audio Capture Drift
Detection test to ensure proper audio and video
synchronization between your sound card and your Matrox
RT.X hardware. This test must be run prior to performing
an analog capture. If you update or re-install the drivers for
your sound card, or move your sound card to another slot,
you should run the Audio Capture Drift Detection test
again.
Solution Run the Audio Capture Drift Detection test Run the
test manually.
°To run the Audio Capture Drift Detection test:
1 Choose Start > Programs > Matrox X.tools >
Audio Capture Drift Detection
.
2 From the Tes t Dur a tio n list, select a duration for the
test. In most cases, five minutes will give you good
results.
¦NoteIf you often perform long analog captures (longer than
one hour), it
’s recommended that you select one of the longer
test durations from the Te s t D u rat i o n list (such as 10
minutes).
3 Click Start to run the test.