M-Audio Mac Syncman Manual page 5

SMPTE sync stripes.
• Selectable chase Delay time. Depending on the speed of your
Macintosh and program, a longer or shorter delay may be required
for the sequencer to properly "chase" when syncing to tape. The
Delay dip-switch allows you to set a long (when up) or short (when
down) delay time.
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