MOTU Digital Timepiece Instruction Manual Page 73

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CHAPTER
71
8 SMPTE Synchronization
OVERVIEW
This chapter explains how to use your MOTU
Express interface to synchronize computer
software and other devices to an audio tape
recorder (ATR), video tape recorder (VTR), or
other time code sources using SMPTE time code. It
also explains how to generate SMPTE (a process
commonly referred to as striping).
This chapter also explains how to:
Slave your Express interface and other devices to
MIDI Time Code
Measure incoming time code to see how fast or
slow it is
Solve various SMPTE synchronization problems
If you are new to SMPTE Sync . . . . . . . . . . . . . . .71
Accessing SMPTE settings. . . . . . . . . . . . . . . . . . .71
LOcking your Express interface to SMPTE . . . .71
Striping SMPTE. . . . . . . . . . . . . . . . . . . . . . . . . . . .73
LTC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
MTC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
IF YOU ARE NEW TO SMPTE SYNC
If you are not familiar with the process of
synchronizing with SMPTE time code, see
Appendix B, “SMPTE Synchronization Basics
page (145)before reading this chapter. It provides a
definition of SMPTE time code and an explanation
of how it is used for synchronizing MIDI devices to
audio and video equipment.
ACCESSING SMPTE SETTINGS
You can access the sync settings in your MOTU
interface via Express Console software. See
chapter 6, “Using Micro Express Console
(page 31) or chapter 7, Using MIDI Express XT
Console (page 51) for details.
LOCKING YOUR EXPRESS INTERFACE TO
SMPTE
Your Express interface ships from the factory ready
to lock the computer to SMPTE time code as soon
as it receives SMPTE time code via pre
programmed MIDI Time Code (MTC) routing
from the MTP/Express to the computer. The MIDI
Express XT will send MIDI Time Code to the
computer as soon as it locks up. Any software
running on the computer can then slave to the time
code. Make sure the software is set up properly as
described in chapter 4, “SMPTE Sync and MMC
with a Windows Sequencer (page 21).
When your Express interface locks to the time
code, the green “LOCK” LED on the front panel
glows steadily and the red “TACH” LED blinks
regularly. In addition, the green computer OUT
LED glows steadily, indicating that MIDI time code
(MTC) is being sent to the computer.
Figure 8-1: Converting time code. When your Express interface
converts incoming time code, the red TACH light blinks, the green
LOCK light glows steadily, and the green computer OUT light glows
Red TACH light
Green
LOCK light
Green
computer OUT
light
!USB Interfaces Manual Book Page 71 Tuesday, October 10, 2000 12:43 PM
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