Apple Logic Express 8 - Manual (Page 858)

858 Chapter 35 Synchronizing Logic Express
SMPTE Type
This is where you define the SMPTE format that you want to use:
 LTC: Longitudinal (also called Linear) Time Code is written to a tape track.
 VITC: Vertical Interval (or Vertically Integrated) Time Code is written invisibly to a
video tape.
Freewheel
You can set the freewheel time (in frames) for LTC and VITC. The freewheel parameter
affects the SMPTE reader, and specifies how long the synchronizer continues
transferring MTC to the sequencer, after time code ceases to be read.
Long freewheel times can maintain synchronization, even if there are drop outs in the
time code, but they also increase the reaction time of Logic Express—after the time
code master stops. In practice, you should set a value that is as large as necessary (for
sustained operation), and as small as possible (to reduce waiting times).
TV Format
Allows you to define the television format for time code burn-in:
 PAL: The video format used in Europe, South America, most Asian and African
countries, and Oceania. If you are working with video in SECAM format (used in
France and French-speaking nations in Africa), select PAL.
 NTSC: The video format used in the USA, Central America, Japan, and Canada.
VITC Line 1, VITC Line 2
VITC is written into two lines of the video picture, which are normally invisible. The lines
should not be adjacent, and are usually situated between 12 and 20.
If the Scan option is enabled, the VITC lines are automatically recognized. You should
only enter the lines manually if there are problems with Scan mode.
Visible Time Code Display
The parameters allow you to set the position, size, and style of the time code counter
window, which is burned-into the video picture.