MOTU micro express-USB, User Manual

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S Y N C H R O N I Z A T I O N W I T H T H E A V
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Slaving the 2408 to the AV with Word Clock
Use this scenario if when you don’t have any
ADATs. Connect the MIDI Timepiece AV’s Word
Clock Out to the 2408 audio interface’s Word Clock
In port as shown below in Figure 12-2.
Figure 12-2: Slaving a 2408 system to the MIDI Timepiece AV via Word
Clock.
The settings for this setup are as follows:
SLAVING A COMPUTER TO THE MTP AV
The MIDI Timepiece AV ships from the factory
ready to lock the computer to SMPTE time code
via pre programmed MIDI Time Code (MTC)
routing from the AV to the computer. The MIDI
Timepiece AV 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 to lock to
MIDI time code.)
When the MTP AV 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 12-3: Converting time code. When the MTP AV converts incom-
ing time code, the red TACH light blinks, the green LOCK light glows
steadily, and the green computer OUT light glows steadily as well.
If the LOCK and TACH lights do no behave as
described, the MTP AV is not successfully locking
to the SMPTE time code. This could be a problem
with the audio connections between the tape deck
and the MTP AV. It could also be that the SMPTE
level is not high enough. See Appendix C,
“Troubleshooting and Customer Support”
page (149).
If the LOCK and TACH lights look OK, but the
green computer OUT LED is not glowing, this
means that the MIDI Timepiece AV settings have
been altered somehow such that it is not sending
System
Component Setting for the
ADAT sync scenario
MTP AV
sync mode You can use any sync mode except LTC/
QuikLock. The 2408 system will resolve to
the MTP AV, even when the AV itself is
resolving to SMPTE, video, etc. If you want
to drive the whole rig from your MMC-com-
patible software, set the AV to Internal
mode. This lets you do transport control
from your software.
2408 system In the PCI-324 Console window, set the
Clock Source menu to ‘2408: Word’. Also
make sure the sample-rate setting matches
the ADATs and the MTP AV.
Audio software Make the appropriate setting in the software
to slave to the PCI-324 card.
Other
MIDI/audio
software Slave it in the normal fashion to MIDI Time
Code from the MIDI Timepiece AV.
Windows computer running
audio software
Word Clock Out
MIDI Timepiece AV
USB
Word Clock IN
Red TACH light
Green LOCK light
Green computer OUT light
!USB Interfaces Manual Book Page 124 Tuesday, October 10, 2000 12:43 PM