User Manual-Mac

INSTALLING THE PCI-424 HARDWARE
41
SYNCING TO SMPTE TIME CODE
The PCI-424 system can resolve directly to SMPTE
time code from any analog input on any audio
interface. It can also generate time code and word
clock, under its own clock or while slaving to time
code. Therefore, the system can act both as an
audio interface and digital audio synchronizer, to
which you can slave other digital audio devices.
You can use the PCI-424 system to slave your audio
software to SMPTE as well, as long as your software
supports sample-accurate sync, which is the means
by which the software follows the PCI-424. The
accuracy may not be sample-accurate, but in most
cases it will be pretty close. If you would like to
resolve to video and SMPTE, see the next page.
Other digital audio
device slaved to the
PCI-424 system
Macintosh computer running
AudioDesk, Digital Performer or other
sample-accurate software.
Figure 3-23: Connections for synchronizing the
PCI-424 system directly to SMPTE time code.
In AudioDesk or Digital Performer, choose Receive Sync from
the Basics menu. Choose the Sample-accurate option. For
sample-accurate sync settings in Cubase, see “Sample-
accurate sync with Cubase or Nuendo” on page 95.
Choose PCI-424: SMPTE as the clock source in AudioDesk, Digital
Performer, or the MOTU PCI Audio Console application. This setting
can also be made in the MOTU SMPTE Console (shown below).
2408mk3 interface
SMPTE time code source
audio cable bearing LTC
(Longitudinal Time Code)
SMPTE IN
RCA jack
(or any analog input)
Audio Wire cable
PCI-424 card
Launch the MOTU SMPTE Console and specify the SMPTE Source, which is
the analog input receiving the SMPTE time code. Also, confirm that the
Clock Source is PCI-424: SMPTE/SMPTE. For details about the other settings,
see chapter 14, “MOTU SMPTE Console” (page 117).
video
cable
audio
cable
SMPTE
out
Word
Out
When lockup is achieved,
the LOCK light illuminates
and the TACH light blinks
once per second.
Use this setup if you have:
✓ A SMPTE time code source, such as a multitrack tape deck.
✓
A PCI-424 core system by itself, OR an expanded PCI-424
system that includes other MOTU PCI interfaces and maybe
one other slaved device (such as a digital mixer).
✓ Host software that supports sample-accurate sync.
This setup provides:
✗
No sample-accurate locating.
✓ Continuous sync to SMPTE time code.
✓ Sub-frame timing accuracy.
✓ Transport control from the SMPTE time code source.