User Manual-Mac

INSTALLING THE PCI-424 HARDWARE
42
SYNCING TO VIDEO
The 2408mk3 interface can continuously resolve
directly to video, while at the same time
referencing SMPTE time code, with no additional
synchronization device required. When you
choose video as the clock source (as shown below),
the Word Clock BNC connector switches to a video
input. Both NTSC and PAL/SECAM rates are
supported. The MOTU SMPTE Console software
provides options for freewheeling both time code
and video time base. To resolve your audio
software to video as well, it must support sample-
accurate sync. For details, see “Is your audio
software sample-accurate?” on page 37.
Figure 3-24: Connections for synchronizing a 2408mk3-based
PCI-424 system directly to video.
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: Video 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
Video deck
or other video source
audio cable bearing LTC
(Longitudinal Time Code)
SMPTE IN
RCA jack
(or any analog input)
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).
WORD (video) IN
BNC jack
Video cable
Other digital audio
device slaved to the
2408mk3
Macintosh computer running
AudioDesk, Digital Performer or other
sample-accurate software.
Audio Wire cable
PCI-424 card
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 video deck or other video source, with SMPTE time code.
✓
A 2408mk3 core system by itself, OR a small 2408mk3 system
that includes other MOTU PCI interfaces and maybe one other
device (such as a digital mixer) slaved to the 2408mk3.
✓ 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.